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The Late Treaty and Post Treaty Battleships, an Introduction

Line Drawing of the German H-39 Class Battleship

Friends of Padre Steve’s World,

I am still on Trump and COVID19 overload so I am going back to the introductory article of a series I planned years ago.

This is the introductory article for a series of ten articles on the classes of battleships built or planned by the major powers following the expiration of the Second London Naval Treaty. A previous series of articles dealt with the battleships constructed in compliance or close compliance with the treaty. This series will cover the Japanese Yamato Class, and Super Yamato Classthe British Lion Class, the Vanguard, the German Bismarck and H39 Classes, the French Alsace Class, the Soviet Sovyetskiy Soyuz Classand finally the American Iowa and Montana classes.

Model of the Montana Class

When I first wrote this article over a decade ago I classed all of these ships as post-Treaty designs while overlooking the fact that most were designed during the Treaty period, and that most were designed and built in violation of it, or by invoking the  escalator clause. In truth only the Vanguard, the Montana’s and the never laid down German ships of the H-41 Class and beyond, as well as the Japanese Super Yamatos.

All of these ships were designed and built or designed in the late 1930s and early 1940s and with the exception of the Sovietetskiy Soyuz Class built on each navy’s past experience in battleship design and construction. The Japanese had constructed no treaty battleships in the 1930s, so the Yamato’s were the first battleships constructed by Japan since the Nagato Class which had been completed in the 1920s and the incomplete Tosa Class.

The Bismarck

The Second London Naval Treaty of 25 March 1936 was signed by France, Britain and the United States. Japan walked out on the conference and the Italians did not sign because of the outcry that their invasion of Abyssinia had evoked.  The treaty called for ships to have a standard displacement of not more than 35,000 tons and main armament not to exceed 14” guns. This was a reduction in the size of armament from the previous London and Washington treaties. When the Japanese delayed and then refused to sign the agreement, as did the Italians, refused the United States invoked the escalator clause which permitted them to disregard the treaty limitations.

USS Iowa lead ship of the Iowa class

The Americans who invoked only the armament part of the clause on the North Carolina and South Dakota classes. However they took full advantage of it to construct the 45,000 ton Iowa class. The plans called for six of this class, but only four were completed. The Montana Class of 65,000 tons mounting twelve 16” guns and Provided protection against that type of shell. The Montana Class ships were never laid down but because of their features will be covered in this series of articles.

Line Drawing of the Lion Class

Following the King George V Class the Royal Navy planned the Lion Class which was in essence an enlargement of the King George V Class armed with nine 16” guns.  Four of the Lion ships we’re planned, but none were to built. They cancelled early in the war and only one further battleship the 44.500 ton HMS Vanguard would be completed by the Royal Navy but not until 1946.

HMS Vanguard

The Germans, who were not a signatory to the treaty but had an agreement with Britain to limit their total naval tonnage to 35% of Britain’s had build the Scharnhorst Class Battlecruisers in the mid 1930s and began the Bismarck Classthe largest capital ships completed in Europe. These were to be followed by the H39, H41, H42, H43 and H44 classes ranging in displacement from 56,444 tons to 131,000 tons with armament ranging from eight 16” to eight 20” guns. Since just two of the H39’s were laid down and then cancelled while in the early stages of construction, and the others never laid down, so I will only discuss the H39 class in this series. The others only existed in the world of a mad dictator’s fantasies.

Sovyetskiy Soyuz Class

The Soviet Union which was never a signatory to any of the naval treaties and had not built a battleship since the First World War planned the massive Sovyetskiy Soyuz Class. This would have been a Class of 15 ships would have displaced 58,220 tons and mounted nine 16” guns. Several designs were evaluated, including those of American and Italian shipbuilders and designers. The foreign designs were rejected in favor of a Soviet design. However, the timing coincided with Stalin’s purge of the Armed forces leadership, as well as men who ran military and naval production plants. This added a further delay in their design and construction. The four initial ships of the class were laid down but never completed due to the Nazi invasion in 1941. Construction was halted and all were scrapped after the war.

Yamato

The Japanese Yamato Class, the largest battleships ever constructed of 69,998 tons standard displacement armed with nine 18” guns, the largest main battery ever installed on battleships were the largest capital ships built before the second generation of U.S. Navy super carriers.

The French Alsace Class was intended to counter the German H-39s. They would have been an enlarged and more heavily armed modification of the Richelieu Class. However, the German attack and and conquest of France led to their cancellation before they were ever laid down.

The first article I write will be about the Bismarck Class and that will appear later this week. This will be cutting it close because I plan on dealing with Operation Rheinübung, the deployment of Bismarck and Prinz Eugen which would turn out to be one of the most intense times of the war, especially for the British and the Royal Navy. So tomorrow on to the Bismarck and Tirpitz.

Peace,

Padre Steve+

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Filed under germany, History, imperial japan, Military, Navy Ships, nazi germany, World War II at Sea, world war two in europe, world war two in the pacific

Short, Squat, Powerful and Well Protected: The South Dakota Class Battleships

Friends of Padre Steve’s World,

I am still on my holiday from writing about the novel Coronavirus 19 and President Trump and his Administration’s incompetent response to it. It is a response that has already claimed 87,000  American lives, and every day more damning evidence shows the results for the President’s use of it for political purposes, almost all of which are backfiring as much as his malfeasance and willingness to see Americans die by the tens of thousands to maintain his cloud-cuckoo-land fantasy that this will go back to normal as if by magic. But, I won’t go any farther tonight on that tonight.

I was so inflamed about what was happening earlier today I decided that it was best to continue my series on the battleships designed and built by the British, French, Germans, Italians, and Americans from after the Battleship Holiday mandated by the Washington Naval Treaty, and the restrictions of the London Naval Treaty. The Germans were not signatories to these treaties as they were already under the much more severe provisions of the Treaty of Versailles, until the Hitler regime began to clandestinely violate it in 1934, and publicly in 1935. The British signed at bilateral naval accord with Germany in June of 1935, which the Germans renounced in 1938 in order to build a fleet of battleships that Hitler believed would allow him to achieve naval parity or superiority over the British, which he renounced in 1938 during the Czechoslovakia crisis.

This is the fifth and last in a series of articles about the battleships built under the provision of the Washington and London Naval Treaty limitations in the 1930s. I am not including the ships which were already in service or completed in the immediate aftermath of the Washington Treaty. That treaty required the British to scrap 23, the Americans 30, and Japanese 17 Battleships or Battlecruisers to comply with the treaty. Some were allowed to be converted to Aircraft Carriers, and some demilitarized to serve as training or target ships.

This series looks at the modern battleships built by the future World War II combatants between 1932 and 1939. This article covers the American South Dakota Class. Previous articles dealt with the British Royal Navy’s King George V Class, The German Kriegsmarine Scharnhorst Class, the Italian Reginia Marina’s Vittorio Veneto Class, the United States Navy’s North Carolina Class, and the French Dunkerque and Richelieu Classes.The German Bismarck, Japanese Yamato, British Vanguard and American Iowa classes will be covered in a subsequent series.

I think that I will also go back and deal with various classes of ships that were allowed to be kept after the Washington Naval Treaty. These included  two of the three partially built American Colorado Class, the two ship British Nelson Class, and the second of the Japanese Nagato Class, the Mutsu; and the battleships and battlecruisers that were completed as Aircraft Carriers by the United States, Britain, Japan, and France. From there I could move on and write about and the new battleships and battlecruisers planned or under construction at the time the treaty came into effect, the ships that had they been built would have launched a major naval arms race in the 1920s, something that few nations could have afforded, especially Great Britain.  I think I will even go back to the Dreadnoughts and Battlecruisers of the First World War. Of course there are a lot of them, so I will probably focus on the ships that continued serving through the Second World War. I might even delve into the German H type battleships which were more fanciful than realistic, only satisfying the need of Hitler for nothing but the biggest, the American Montana Class, the British HMS Vanguard, the French Alsace Class, and the Japanese A-150 or Super Yamato’s. 

Since there is much disagreement about which of the ships that I have written about in this series,  I may try to do a comparison to determine which was the best of these classes in the categories, of armament, speed and range, armor protection, reliably, and performance in combat. One has to remember that these were the first battleships built by their respective navies since the First World War, each was built under the constraints imposed by the naval treaties, and their influenced by the developments of potential opponents and the changing world situation. In some cases sacrifices were made on each design due to expediency and the need to get them to the fleet.

As the world edged closer to war in the late 1930s the U.S. Navy followed up its decision to build the two ship North Carolina class battleships with additional fast battleships. Initially the General Board wanted two additional North Carolina’s the Chief of Naval Operations, Admiral William H. Standley wanted a different design, which may have created the toughest and best of the battleships in this series. Compared to the other battleships built in this era, the South Dakota Class was short, fat, a bit slower, but was superbly protected with a well designed armored citadel, excellent main, secondary, and anti-aircraft batteries, and superior radars, fire direction systems and combat operation centers. They demonstrated a knack for survival as well as an ability to inflict damage, as was shown by the South Dakota and Massachusetts.

USS South Dakota BB-57 in 1943

Design work started in 1937 and several designs were proposed in order to correct known deficiencies in the preceding North Carolina class to include protection and the latest type of steam turbines.  As in the North Carolina’s the Navy struggled to find the optimal balance between armament, protection and speed. In the end the Navy decided on a shorter hull form with greater beam which necessitated greater power to maintain a high speed. The armor protection was maximized by using an interior sloped belt of 12.2 inch armor with 7/8” STS plates behind the main belt which made the protection the equivalent to 17.3 inches of vertical armor. The Belt continued to the bottom of the ship though it was tapered with the belt narrowing to 1 inch to provide addition protection against plunging fire which struck deeper than the main belt. As an added feature to protect against torpedo hits a multi-layered four anti-torpedo bulkhead system was included, designed to absorb the impact of a hit from a 700 pounds of TNT.

In order to accommodate the machinery necessary to provide the desired speed of 27 knots on the shorter hull the machinery spaces were rearranged.  The new design placed the boilers directly alongside the turbines with the ship’s auxiliaries and evaporators also placed in the machinery rooms. Additional design changes made to save space included making the crew berthing areas smaller. This included that of officers as well as the senior officers and shrinking the size of the galley’s and the wardroom from those on the North Carolina’s. The resultant changes allowed the ships to achieve the 27 knot speed, improved protection and carry the same armament of the North Carolina’s within the 35,000 treaty limit.

Two ships of the design were approved and with the escalator clause invoked by the Navy two more ships were ordered all with the nine 16” gun armament of the North Carolina’s.  The leading ship of the class the South Dakota was designed as a fleet flagship and in order to accommodate this role two of the 5” 38 twin mounts were not installed leaving the ship with 16 of these guns as opposed to the 20 carried by the rest of the ships of the class. The final design was a class of ships capable of 27.5 knots with a range of 17,000 miles at 15 knots mounting nine 16” guns with excellent protection on the 35,000 tons and full load displacement of 44,519 tons.

The lead ship of the class the USS South Dakota BB-57 was laid down 5 July 1939 at New York Shipbuilding in Camden New Jersey, launched on 7 June 1941 and commissioned on 20 March 1942.  Following her commissioning and her shakedown cruise South Dakota was dispatched to the South Pacific. Soon after her arrival she struck a coral reef at Tonga which necessitated a return to Pearl Harbor for repairs.

When repairs were complete she was attached to TF 16 escorting the USS Enterprise CV-6 during the Battle of the Santa Cruz Islands on 26 October 1942.  During the battle she was credited with shooting down 26 Japanese aircraft but was struck by a 500 lb bomb on her number one turret which caused no damage.


The Dent in South Dakota’s Number Three Turret from a hit from a 14” Shell from Kirishima

She joined TF-64 paired with the battleship USS Washington during the Second Naval Battle of Guadalcanal on14-15 November 1942. During the action South Dakota suffered a power outage and was hit by over by a minimum of 26 enemy shells, and possibly up to 40. At least one of a 14” shell from Kirishima, 18 8” shells from the Heavy Cruisers, 6 6” shells from from Japanese light cruisers, and at least one 5” shell from a destroyer. The damage was superficial, once her power was restored much of the damage was repaired ship’s crew. The shellfire knocked out three of her fire control radars, her radio and main radar set which were also repaired.

Three of the escorting destroyers, USS Preston, USS Walke, and USS Benham were sunk or mortally wounded, and USS Gwin was damaged.destroyers were also lost but the Washington mortally wounded the fast battleship Kirishima and destroyer Ayanami which were scuttled the next day and damaged the heavy cruisers Atago and Takao.

South Dakota returned to New York for repairs which completed in February 1943. She joined the carrier USS Ranger CV-4 for operations in the Atlantic until April when she was attached to the British Home Fleet. She sailed for the Pacific in August 1943 and rejoined the Pacific Fleet in September. The battleship joined Battleship Divisions 8 and 9 and supported the invasion of Tarawa providing naval gunfire support to the Marines.

South Dakota spent the rest of the war was spent escorting carriers as well as conducting bombardment against Japanese shore installations. She participated in almost every action of the U.S. drive across the Central Pacific. She was struck by a 500 pound bomb during the Battle of the Philippine Sea that destroyed several anti-aircraft mounts and killed 26 of her crew.

A Photo taken from South Dakota while anchored in Tokyo Bay with Mount Fuji in the Background 

South Dakota was present at the Japanese surrender in Tokyo Bay and returned to the United States in 1945. She was decommissioned and placed in reserve on 31 January 1947. She was stricken from the Naval Register on 1 June 1962 and sold for scrap in October of that year. Various artifacts of this gallant ship to include a propeller, a 16” gun and the mainmast are part of the USS South Dakota Memorial Park in Sioux Falls South Dakota. 6,000 tons of armored plate were returned to the U.S. Atomic Energy Commission for use in civilian nuclear programs and a second screw is displaced outside the U.S. Naval Museum in Washington D.C.  She received 13 battle stars for World War II service.

South Dakota also had the dubious distinction of having the youngest sailor of the war 12 year old Calvin Graham who confessed lying about his age to the Gunnery Officer, LT Sergeant Schriver. Graham was court-martialed and given a dishonorable discharge spending 3 months in the ship’s brig before he was able to be returned to the United States where just after his 13th birthday he entered 7th grade. Shriver was wounded at Guadalcanal and was awarded the Purple Heart. He left the Navy in in 1945 as a Lieutenant Commander. He later became the Brother in law of John F. Kennedy, and the first Director of the Peace Corps, and became the the running mate of Senator George McGovern in the 1972 Presidential Election, to Richard Nixon and Spiro Agnew. 

USS Indiana BB-58 Bombarding Japan in 1945

The second ship of the class the USS Indiana BB-58 was laid down at Newport News Naval Shipyard on 20 November 1939 launched on 21 November 1941 and commissioned on 30 April 1942.  She served throughout the Pacific War by serving with the fast battleships of Vice Admiral Willis Lee’s TF-34, escorting carriers during major battles such that the Battle of the Philippine Sea or as it is better known the Marianas Turkey Shoot. She returned to the United States for overhaul and missed the Battle of Leyte Gulf but served at Iwo Jima, Okinawa and operations against the Japanese home islands. During the beginning of the Marshall Islands campaign Indiana received her heaviest damage. During night operations with a carrier task group she turned in front of USS Washington. A collision ensued which caused heavy damage to Indiana, including the loss of nearly 200 feet of her armored belt. The collision took off about 20 feet of Washington’s bow which remained imbedded in the Indiana until she was repaired. Washington also required a return to the United States for repairs.

Following the war she was decommissioned in 1947 and sold for scrap in September 1963.   A number of her relics are preserved at various locations in Indiana and her prow and mainmast are centerpieces of a display at the University of Indiana’s football stadium. Much of her armor was provided to the U.S. Atomic Energy Commission for use in civilian programs.

USS Massachusetts BB-59 in January 1946 in the Puget Sound

The third ship of the class the USS Massachusetts BB-59 was laid down on 20 July 1939 at Bethlehem Steel Corporation Fore River Yard in Salem Massachusetts and launched on 23 September 1941 and commissioned on 12 May 1942. After her shakedown cruise she was assigned to the Atlantic Fleet where she took part in Operation Torch, the Allied invasion of French North Africa. During the operation she engaged French shore batteries, damaged the battleship Jean Bart and sank 2 cargo ships and along with the heavy cruiser Tuscaloosa sank the destroyers Fougueux and Boulonnais and the light cruiser Primauguet.

Following her assignment in the Atlantic she sailed for the Pacific where she began operations in January 1944. She took part in almost every major operation conducted by the Pacific Fleet escorting the Fast Carrier Task Forces and operating as a unit of TF-34 the Fast Battleship Task force including the Battle of Leyte Gulf.  She ended the war conducting operations against the Japanese home islands.  She was decommissioned in 1947 and stricken from the Naval Register on 1 June 1962.

USS Massachusetts BB-59 at Battleship Cove, Fall River Massachusetts

She was saved from the fate of Indiana and South Dakota as the people of Massachusetts with the assistance of schoolchildren who donated $50,000 for her renovation and preservation as a memorial. She became that in 1965 at Battleship Cove in Fall River Massachusetts and she remains there designated as a National Historic Landmark.  During the naval build up of the 1980s much equipment common to all modern battleships was removed for use in the recommissioned battleships of the Iowa class.


The final ship of the class the USS Alabama BB-60 was laid down on 1 February 1940 at Norfolk Naval Shipyard. She was launched on 21 February 1942 and commissioned 16 August 1942. Following her shakedown cruise and initial training off the Atlantic coast she joined the repaired South Dakota and operated as part of TF 22 attached to the British Home Fleet.

She conducted convoy escort operations, participated in the reinforcement of Spitsbergen and in an operation which attempted to coax the German battleship Tirpitz out of her haven in Norway. Tirpitz did not take the bait and Alabama and South Dakota returned to the United States in August 1943.

Following a brief refit she and South Dakota transited to the Pacific were the trained with the fast carriers.  She took part in the invasion of the Gilberts taking part in Operation Galvanic against Tarawa and the Army landings on Makin Island.

As 1944 began Alabama continued her operations with the fast carriers of TF-38 and the fast battleships of TF-34.  She took part in operations against the Marshalls and took part in the invasion of the Marianas Islands and the Battle of the Philippine Sea, the Great Marianas Turkey Shoot. From there she supported the invasion of Palau and other islands in the Caroline Islands followed by operations against New Guinea and the invasion of the Philippine and the Battle of Leyte Gulf before returning to the United States for overhaul.

Chief Petty Officer Bob Feller
Alabama 
returned to action during the invasion of Okinawa and in shore bombardment operations against the Japanese Mainland. When the war ended the Alabama had suffered no combat deaths and only 5 wounded following the misfire of one of her own 5” guns earning her the nickname of “Lucky A.”  Hall of Fame pitcher Bob Feller served as a Chief Petty Officer and gun mount captain on Alabama during the war.

She was decommissioned on 9 January 1947 and stricken from the Naval Register on 1 June 1962. The people of the State of Alabama formed the “Alabama Battleship Commission” and raised $1,000,000 including over $100,000 collected by schoolchildren to bring her to Alabama as a memorial.  She was turned over to the state in 1964 and opened as a museum on 9 January 1965. She was declared a National Historic Landmark in 1986.  She has been used as a set in several movies and continues to serve as a museum preserving the legacy of the men that served aboard her and all of the battleship sailors of World War II.

another thing about the South Donata Class was that their design was evident in the rebuilding of the USS California, USS Tennessee, and USS West Virginia when they were completely modernized after Pear Harbor.

USS West Virginia after her complete modernization after being sunk at Pearl Harbor

In the 1950s a number of proposals were considered to modernize the ships of the class to increase their speed to 31 knots using improved steam turbines or gas turbines. The Navy determined that to do this would require changes to the hull form of the ships making the cost too prohibitive.  The ships were certainly the best of the treaty type battleships produced by any nation in the Second World War. The damage sustained by South Dakota at the Second Naval Battle of Guadalcanal would have not only put most battleships of her era out of action but might have caused enough damage to sink them. Their armament was equal or superior to all that except the Japanese Yamato Class and their protection was superior to most ships of their era, and it was was exceptional, as was evident by the damage sustained by South Dakota. 

Alabama as a Museum Ship 

It is good that both the Massachusetts and the Alabama have been preserved as memorials to the   ships of the class, their sailors and the United States Navy in the Second World War. Because of the efforts of the people of Massachusetts and Alabama millions of people have been able to see these magnificent ships and remember their fine crews. Both have hosted reunions of their ships companies since becoming museum ships and with the World War Two generation passing away in greater numbers every day soon these ships as well as the USS Texas, USS North Carolina, USS Missouri, USS New Jersey, USS Wisconsin aUSS Iowa which stricken from the Naval Register awaits an uncertain fate as a resident of the “Ghost Fleet” in Suisun Bay California.  No other nation preserved any other dreadnought or treaty battleship thus only these ships remain from the era of the Dreadnought. I so much wish that the British had preserved one of the King George V  ships, or maybe the mostend celebrated Royal Navy Battleships of both World Wars, the HMS Warspite had been preserved. I also regret that none of the survivors of the attack on Pearl Harbor were preserved, nor any of the standard battleships of the Nevada, Pennsylvania, New Mexico, California, or Colorado Classes.

I am fortunate. I have been able to go aboard the North Carolina, Alabama, Texas, and Wisconsin, as well as a number of the surviving aircraft carriers, destroyers, and submarines preserved in the United States. However, too few, especially the ships which bore the brunt of the war like the carrier USS Enterprise were never saved, despite the pleas of men like Admiral William “Bull” Halsey.

I habe also been able to visit ships like the USS Constitution, USS Constellation, Clipper ship Star of India, the Japanese Battleship Mikasa, the USS Nautilus, the German Tall Ship Gorch Fock II, and so many more, but I still have a bucket list of ships I want to visit in the United States, Canada, Great Britain, Germany, Greece, Sweden, Russia, France, Australia, Italy, Turkey, Japan, and Finland.

With those pipe dreams in mind, I wish you all the best. Until tomorrow when I decide to weigh in again on novel Coronavirus 19 and the crisis being fostered by the Trump Administration in this country; please be safe. Don’t do dumb things like going into crowded places with few people wearing masks and the vast majorly of people not adhering to social distancing. Even if other people decide to be stupid and put others and well as their own lives at risk, don’t be like them. I speak this from the heart and I don’t care if someone disagrees with my politics, faith, or social commentary, I would prefer that they not die or through their stupidity and arrogance get other people sick or die. Darwin is not Kind when it comes to the stupidity and arrogance of people regardless of the race, ethnicity, faith, ideology, political leanings, social standing, economic position, or nationality.

I don’t care if people agree with me or not, but don’t do dumb things. This may sound harsh but I tend to speak from my heart when lives and civilization itself are at stake. But please remember the words of Robert Henlein:

“Stupidity cannot be cured. Stupidity is the only universal capital crime; the sentence is death. There is no appeal, and execution is carried out automatically and without pity.” 

Peace,

Padre Steve+

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Filed under Foreign Policy, historic preservation, History, imperial japan, Military, Navy Ships, nazi germany, Political Commentary, US Navy, World War II at Sea, world war one, world war two in europe, world war two in the pacific

The North Carolina Class Battleships: The First of the Modern U.S. Navy Battleships

Friends of Padre Steve’s World,

After spending the time to take two days each to write two detailed articles on issues related to the novel Coronavirus 19 I needed a break. I could have started another COVID 19 article tonight but I needed a break, especially after I listened to today’s COVID 19 Task Force Press conference, which was more of a cheerleading fan rally than anything seriously informative. But I have to leave that here for now, I don’t have the emotional energy to write about it right now, after all there will be plenty of other chances to chronicle this and more.

So tonight I am going back to different classes of naval warships. This is another in a series of six articles on the battleships built under the provision of the Washington and London Naval Treaty limitations in the 1930s. I am not including the ships which were completed in the immediate aftermath of the Washington Treaty limitations. This series looks at the modern battleships that the World War II combatants would produce in the 1930s which saw service in the war. The first deal that the German Scharnhorst class and another covered the Italian Vittorio Veneto class. In between my commentary on current events, as well as the Holocaust, I plan to go back to the French Dunkerque and Richelieu classes, the British King George V class, and the United States South Dakota class. The German Bismarck, Japanese Yamato, British Vanguard and American Iowa classes will be covered in a subsequent series.I will probably write about the battleships that each of these nations planned but either did not complete or never left the drawing board, including  the fantastical German ships of the various H classes.

So until tomorrow, I hope that you enjoy this.

Peace,

Padre Steve+

Turret base of USS Washington being lowered into barbet

The United States finished the First World War as the rising economic and potential military power in the world. The British Empire was economically reeling beset by massive debts, heavy loss of life and an empire which was beginning to smell the fresh breezes of independence.  The United States retreated into isolationism and a naïve and unfounded optimism that war could be outlawed while turning its back on the one organization that might have helped bring nations together, the League of Nations. In this environment the United States sponsored the Washington Naval Conference of 1922 which produced the Washington Naval Treaty.  The treaty stipulated limitations on total battleship tonnage, main armament and the maximum tonnage allowed per ship. Ships already in existence could not be replaced until they reached the age of 20 years. A battleship “building holiday” of 10 years was mandated with the major signatories allowed to complete a few ships that were already under construction. Whole classes of new construction were cancelled and many ships under construction were scrapped on the ways or completed only to be scrapped or sunk as targets. The Royal Navy completed two ships of the Nelson Class, the United States completed the 3 ship Maryland Class using a 4th vessel the incomplete USS Washington as a target and the Japanese were allowed to complete two ships of the Nagato Class. The Royal Navy completed the Battleship Eagle and Battle Cruisers Furious, Glorious and Courageous as Aircraft Carriers, the U.S. Navy the incomplete Battle Cruisers Lexington and Saratoga and the Japanese the Battle Cruiser Akagi and Battleship Kaga as carriers. The treaty limits of the Washington Conference were renewed in the London Treaty which also sought to limit the main batteries of new battleships to 14 inch guns.

North Carolina Class 16″ Gun Turret

The U.S. Navy began a study of new designs for a fast battleship class to comply with the treaty restrictions in May to July of 1935.  A minimum of 35 different designs were submitted and reviewed by the Navy and also reviewed by the faculty of the Naval War College. These designed included everything from an improved version of the Standard Type which had culminated in the Maryland Class and the never built South Dakota Class.

The Type VII Design, a Return to the Standard Battleship 

After a considerable amount of debate a design called the Type XVI was selected. The design originally called for twelve 14” guns mounted in three quadruple turrets. Other designs considered called for twelve 14″ guns in triple turrets. When the Japanese opted out of the treaty and the Italians began building the Vittorio Veneto Class with 15” guns the U.S. Navy officially adopted the “escalation clause” and the design was modified to mount nine 16” guns in triple turrets primarily due to the expectation that the Japanese Imperial Navy would mount larger guns in its new ships.

Initial Type XVI design with 14″ guns

The Navy worked to achieve the maximum speed, armament and protection that it could within the 35,000 ton limitations of the Washington and London Naval Treaties. There was debate among Admirals and designers as to how to solve the problem with some factions leaning toward greater speed and lighter armor and armament and others weighing in on a slightly slower ship with greater firepower and protection.

The Type XVI (modified) design original called for a main battery of twelve 14” guns in quadruple turrets, but this was changed to nine 16” guns in triple turrets. The main armor belt was 12” inclined 15 degrees with 16” armor on the turret faceplates and barbets having 16” side armor.  Their conning tower was also protected by 14” armor.  This gave them heavier armor than the Italian Vittorio Veneto Class. They had a lighter belt than the British King George V Class but were afforded more protection to their turrets, barbets and conning tower. Likewise, they had slightly less armor than the French Richelieu class due to the Design of the class which placed all main battery guns forward, using all or nothing armor protection. However, the design was a compromise and the armor could not have protected the ships from 16” shellfire, and there were weaknesses in the anti-torpedo defenses which were shown when North Carolina was torpedoed during the Guadalcanal campaign along with the USS Wasp. 

View of USS Washington Conning Tower showing Mk 38 5″ gun directors and SG Surface Search Radar

Their top speed of 27 knots was slower than their European counterparts but their range was far superior to all being able to steam over 20,000 miles at 15 knots and 6,610 miles at 25 knots. Their top speed and ranged decreased slightly during the war with the addition of more anti-aircraft guns and sensors.

Other designs were considered in the selection process, but most of the designs considered had speeds from 27-30 knots depending on whether the designers sacrificed speed for armament and protection, or protection and firepower for speed. One design, the Type VII resembled earlier classes of battleships with a speed of only 23 knots in favor of much heavier protection on a shorter hull.

USS North Carolina BB-55

The North Carolina Class was comparable in many ways with the Japanese Nagato Class in speed, protection and armament, but they had a far greater cruising range which made them excellent for operations in the Pacific either parts of Fast Carrier task forces, the Battle Line of the Third or Fifth Fleet, or centerpieces of surface action groups.

The North Carolina’s also were superior to their contemporaries in their anti-aircraft armament as well as their electronics, radar and fire direction suites which were all continuously upgraded throughout the war.

The construction of the ships was slow due to material shortages in the late 1930s. Likewise, the design change to 16” guns from the original 14” guns, as well as labor issues which not only lengthened the time of their construction and raised their cost from $50 million to $60 million dollars each.

North Carolina during underway replenishment in the Pacific

USS North Carolina was laid down on 27 October 1937, launched on 13 June 1940 and commissioned 9 April 1941. However, it was months before she was operational due to severe longitudinal vibration of her propeller shafts which was corrected by a modified propeller design.  Despite the efforts to keep to the treaty limitations the ships displaced 36,600 long tons and had a full load displacement of 44,800 long tons. By 1945 the ships full load displacement had increased to 46,700 long tons for North Carolina and 45,370 long tons for Washington.

Torpedo Damage to North Carolina

When North Carolina completed her shakedown cruise she was sent to the Pacific where she joined Task Force 16 and the USS Enterprise on 6 August 1942.   She defended Enterprise during the Battle of the Easter Solomons on 24 August and during an 8 minute period she shot down between 7 and 14 Japanese aircraft. On 15 September she was badly damaged by a torpedo from the Japanese submarine I-15 which necessitated her withdraw to Pearl Harbor for repairs.

The gravity of the damage from the hit sparked great debate in the Navy regarding her protection with some wondering if too much had been sacrificed in her design, despite this no modifications were made to the ships of the Iowa class.

Upon her return to service she operated with TF 38 and TF 58 protecting the carrier task forces in their operations against the Japanese as well as with TF 34 the Fast Battleship Task Force under the command of Vice Admiral Willis Lee.  Serving throughout the Pacific campaign she took part in every major operation in the Central Pacific except Leyte Gulf and against the Japanese mainland.  Her Marines and Sailors took part in the initial occupation of Japan.  She was decommissioned and placed in reserve on 1 June 1960 and survived scrapping to be bought by the State of North Carolina for $250,000 and turned into a memorial at Wilmington North Carolina.  She remains a National Historic Landmark and is maintained by the USS North Carolina Battleship Commission. She is exceptionally well maintained and much of the ship is open for tours.

USS Washington BB-56 on high speed run in 1945

The USS Washington was laid down 14 June 1938 launched on 1 June 1940 and commissioned 15 May 1941 though like North Carolina had propeller shaft vibrations which delayed her operational availability.  She became the first U.S. Navy Battleship to take an active part in the war when she joined the British Home Fleet in March 1942 operating with the Royal Navy escorting Arctic convoys bound for the Soviet Union against possible forays of the Battleship Tirpitz and other heavy German surface units until 14 July when she returned to the United States for a brief overhaul.

Following her overhaul, Washington was deployed to the South Pacific to join U.S. Forces operating against the Japanese at Guadalcanal and became the Flagship of Rear Admiral Willis Lee.  During the Naval Battle of Guadalcanal on the night of 14-15 November she and the USS South Dakota sailed with 4 destroyers to intercept a Japanese task force.  The Japanese force led by the Battleship Kirishima included 2 heavy and 2 light cruisers as well as 9 destroyers.  The Japanese hit the Americans hard early in the battle sinking 3 of the 4 American destroyers and inflicting significant topside damage to South Dakota which caused a power outage and knocked her out of the action.  Washington sailed on undetected by the Japanese and opened a devastating barrage against Kirishima. Washington scored hits on Kirishima with at least 9 of her 16” shells and over 40 5” shells. Kirishima was mortally wounded. despite the best attempts of her crew to save her, she was scuttled the following day. After mauling Kirishima, Washington then drove off the other Japanese ships sparing Henderson Field from certain heavy damage.

Washington blasting Kirishima at the Naval Battle of Guadalcanal 14-15 November 1942

Washington’s victim the IJN Battleship Kirishima

Washington continued operations in the South and Central Pacific until she was damaged in a collision with USS Indiana which resulted in her losing nearly 60 feet from her bow on 1 February 1944. She received temporary repairs before returning to the Puget Sound Naval Shipyard to receive a new bow and other modernizations returning to action in May 1944. She remained in operation against the Japanese the rest of the war. She was decommissioned in 1947 and struck from the Naval Register on 1 June 1960 and sold for scrap.

North Carolina and Washington in Reserve

Various improvements and ideas were suggested while the ships remained in reserve as some in the Navy wished to reactivate them to include lightening them to increase their speed, and conversion into Helicopter Carriers all of which were rejected. The rejection of these attempts to modernize and recommission the ships ensured their fates.

Fireworks over the North Carolina in Wilmington (US Navy Photo)

Though the North Carolina class was a compromise design they performed admirably throughout the war.  They and their brave crews are remembered in Naval History and the preservation of North Carolina has ensured that they will never be forgotten.

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The Post Treaty Super Dreadnought Battleships: Introduction

Line Drawing of the German H-39 Class Battleship

Note: This is the introductory article for a series of 8 articles on the classes of battleships built or planned by the major powers following the expiration of the Second London Naval Treaty. A previous series of articles dealt with the battleships constructed in compliance or close compliance with the treaty. This series will cover the Japanese Yamato Class, the British Lion Class and the Vanguard, the German Bismarck Class and H39 Class, the Soviet Sovyetskiy Soyuz Class and the American Iowa and Montana classes.

Model of the Montana Class

All of these ships were designed and built or designed in the late 1930s and early 1940s and with the exception of the Sovietetskiy Soyuz Class built on each navy’s experience. The Japanese had constructed no treaty battleships in the 1930s so the Yamato’s were the first battleships constructed by Japan since the Nagato Class which had been completed in the 1920s and the incomplete Tosa Class.

The Bismarck

The Second London Naval Treaty of 25 March 1936 was signed by France, Britain and the United States. Japan walked out on the conference and the Italians did not sign because of the outcry that their invasion of Abyssinia had evoked.  The treaty called for ships to have a standard displacement of no more than 35,000 tons and main armament of 14” guns, a reduction in size of armament from the previous London and Washington treaties. When the Japanese pulled out and the Italians refused to sign the United States invoked the escalator clause which permitted them to disregard treaty limitations.

USS Iowa lead ship of the Iowa class

The Americans who invoked only the armament part of the clause on the North Carolina and South Dakota classes but took full advantage of it to construct the 45,000 ton Iowa class. The Montana Class of 65,000 tons mounting twelve 16” guns and protection proof against that type of shell. Those ships were never laid down but will be covered in this series of articles.

Line Drawing of the Lion Class

The British Royal Navy planned the Lion Class which was in essence an enlargement of the King George V Class armed with nine 16” guns.  The Lion class of which 4 ships were to built was cancelled early in the war and only one further battleship the 44.500 ton HMS Vanguard would be completed by the Royal Navy but not until 1946.

HMS Vanguard

The Germans, who were not a signatory to the treaty but had an agreement with Britain to limit their total naval tonnage to 35% of Britain’s had build the Scharnhorst Class Battlecruisers in the mid 1930s and began the Bismarck Class the largest capital ships completed in Europe. These were to be followed by the H39, H41, H42, H43 and H44 classes ranging in displacement from 56,444 tons to 131,000 tons with armament ranging from eight 16” to eight 20” guns. Only two of the H39’s were laid down and cancelled while in the early stages of construction and I will only discuss the H39 class in this series.

Sovyetskiy Soyuz Class

The Soviet Union which was never a signatory to any of the naval treaties and had not built a battleship since the First World War planned the massive Sovyetskiy Soyuz Class which would have displaced 58,220 tons and mounted nine 16” guns. The four initial ships of the class but were never completed.

Yamato

The Japanese Yamato Class, the largest battleships ever constructed of 69,998 tons standard displacement armed with nine 18” guns, the largest main battery ever installed on battleships were the largest capital ships built before the second generation of U.S. Navy super carriers.

The first article I write will be about the Bismarck Class and that will appear later this week.

 

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The Next Generation: The North Carolina Class Battleships

This is the fourth in a series of six articles on the battleships built under the provision of the Washington and London Naval Treaty limitations in the 1930s. I am not including the ships which were completed in the immediate aftermath of the Washington Treaty limitations. This series looks at the modern battleships that the World War II combatants would produce in the 1930s which saw service in the war. Part one covered the Italian Vittorio Veneto class entitled The Pride of the Regina Marina: The Vittorio Veneto Class Battleships. Part two French Firepower Forward: The unrealized potential of the Dunkerque and Richelieu Class Battleships covered the French Dunkerque class and Richelieu class Battleships. Part three covered the British Royal Navy King George V Class battleships entitled British Bulwarks: The King George V Class Battleships Part Five which was to be a subsection of this article will be on the South Dakota Class. I have already published the final part which covers the German Scharnhorst Class entitled Power and Beauty the Battle Cruisers Scharnhorst and Gneisenau . The German Bismarck, Japanese Yamato, British Vanguard and American Iowa Classes will be covered in a subsequent series.

Turret base of USS Washington being lowered into barbet

The United States finished the First World War as the rising economic and potential military power in the world. The British Empire was economically reeling beset by massive debts, heavy loss of life and an empire which was beginning to smell the fresh breezes of independence.  The United States retreated into isolationism and a naïve and unfounded optimism that war could be outlawed while turning its back on the one organization that might have helped bring nations together, the League of Nations. In this environment the United States sponsored the Washington Naval Conference of 1922 which produced the Washington Naval Treaty.  The treaty stipulated limitations on total battleship tonnage, main armament and the maximum tonnage allowed per ship. Ships already in existence could not be replaced until they reached the age of 20 years. A battleship “building holiday” of 10 years was mandated with the major signatories allowed to complete a few ships that were already under construction. Whole classes of new construction were cancelled and many ships under construction were scrapped on the ways or completed only to be scrapped or sunk as targets. The Royal Navy completed two ships of the Nelson Class, the United States completed the 3 ship Maryland Class using a 4th vessel the incomplete USS Washington as a target and the Japanese were allowed to complete two ships of the Nagato Class. The Royal Navy completed the Battleship Eagle and Battle Cruisers Furious, Glorious and Courageous as Aircraft Carriers, the U.S. Navy the incomplete Battle Cruisers Lexington and Saratoga and the Japanese the Battle Cruiser Akagi and Battleship Kaga as carriers. The treaty limits of the Washington Conference were renewed in the London Treaty which also sought to limit the main batteries of new battleships to 14 inch guns.

North Carolina Class 16″ Gun Turret

The U.S. Navy began a study of new designs for a fast battleship class to comply with the treaty restrictions in May to July of 1935.  A minimum of 35 different designs were submitted and reviewed by the Navy and also reviewed by the faculty of the Naval War College. After a considerable amount of debate a design called the Type XVI was selected. The design originally called for twelve 14” guns mounted in three quadruple turrets. Other designs considered called for twelve 14″ guns in triple turrets. When the Japanese opted out of the treaty and the Italians began building the Vittorio Veneto Class with 15” guns the U.S. Navy adopted the “escalation clause” and the design was modified to mount nine 16” guns in triple turrets primarily due to the expectation that the Japanese Imperial Navy would mount larger guns in its new ships.

Initial Type XVI design with 14″ guns

The Navy worked to achieve the maximum speed, armament and protection that it could within the 35,000 ton treaty limitations. There was debate among Admirals and designers as to how to solve the problem with some factions leaning toward greater speed and lighter armor and armament and others weighing in on a slightly slower ship with greater firepower and protection. The Type XVI (modified) design original called for twelve 14” guns in quadruple turrets but this was changed to nine 16” guns in triple turrets. The main armor belt was 12” inclined 15 degrees with 16” armor on the turret faceplates and barbets having 16” side armor.  Their conning tower was also protected by 14” armor.  This gave them heavier armor than the Italian Vittorio Veneto Class. They had a lighter belt than the British King George V Class but more protection accorded to their turrets, barbets and conning tower while they had slightly less armor than the French Richelieu class due to those ships all guns forward and all or nothing armor protection.

View of USS Washington Conning Tower showing Mk 38 5″ gun directors and SG Surface Search Radar

Their top speed of 27 knots was slower than their European counterparts but their range was far superior to all being able to steam over 20,000 miles at 15 knots and 6,610 miles at 25 knots. Their top speed and ranged decreased slightly during the war with the addition of more anti-aircraft guns and sensors.  Most of the designs considered had speeds from 27-30 knots depending on whether the designers sacrificed speed for armament and protection or protection and firepower for speed. One design, the Type VII resembled earlier classes of battleships with a speed of only 23 knots in favor of much heavier protection on a shorter hull.

USS North Carolina BB-55

The North Carolina Class was comparable in many ways with the Japanese Nagato Class in speed, protection and armament but with a far greater cruising range.

The North Carolina’s also were superior to their contemporaries in their anti-aircraft armament as well as their electronics, radar and fire direction suites which were all continuously upgraded throughout the war.

The construction of the ships was slow due to material shortages, the design change to 16” guns and labor issues which not only lengthened the length of their construction but raised their cost from $50 million to $60 million dollars each.

North Carolina during underway replenishment in the Pacific

USS North Carolina was laid down on 27 October 1937 launched on 13 June 1940 and commissioned 9 April 1941 though it was months before she was operational due to severe longitudinal vibration of her propeller shafts which was corrected by a modified propeller design.  Despite the efforts to keep to the treaty limitations the ships displaced 36,600 long tons and had a full load displacement of 44,800 long tons. By 1945 the ships full load displacement had increased to 46,700 long tons for North Carolina and 45,370 long tons for Washington.

Torpedo Damage to North Carolina

When she completed her shakedown cruise she was sent to the Pacific where she joined Task Force 16 and the USS Enterprise on 6 August 1942.   She defended Enterprise during the Battle of the Easter Solomons on 24 August and during an 8 minute period she shot down between 7 and 14 Japanese aircraft. On 15 September she was badly damaged by a torpedo from the Japanese submarine I-15 which necessitated her withdraw to Pearl Harbor for repairs. The gravity of the hit sparked great debate in the Navy regarding her protection with some wondering if too much had been sacrificed in her design.  Upon her return to service she operated with TF 38 and TF 58 protecting the carrier task forces in their operations against the Japanese as well as with TF 34 the Fast Battleship Task Force under the command of Vice Admiral Willis Lee.  Serving throughout the Pacific campaign she took part in every major operation in the Central Pacific except Leyte Gulf and against the Japanese mainland.  Her Marines and Sailors took part in the initial occupation of Japan.  She was decommissioned and placed in reserve on 1 June 1960 and survived scrapping to be bought by the State of North Carolina for $250,000 and turned into a memorial at Wilmington North Carolina.  She remains a National Historic Landmark and is maintained by the USS North Carolina Battleship Commission. She is exceptionally well maintained and much of the ship is open for tours.

USS Washington BB-56 on high speed run in 1945

The USS Washington was laid down 14 June 1938 launched on 1 June 1940 and commissioned 15 May 1941 though like North Carolina had propeller shaft vibrations which delayed her operational availability.  She became the first U.S. Navy Battleship to take an active part in the war when she joined the British Home Fleet in March 1942 operating with the Royal Navy escorting Arctic convoys bound for the Soviet Union against possible forays of the Battleship Tirpitz and other heavy German surface units until 14 July when she returned to the United States for a brief overhaul.  She then was deployed to the South Pacific to join U.S. Forces operating against the Japanese at Guadalcanal and became the Flagship of Rear Admiral Willis Lee.  During the Naval Battle of Guadalcanal on the night of 14-15 November she and the USS South Dakota sailed with 4 destroyers to intercept a Japanese task force.  The Japanese force led by the Battleship Kirishima included 2 heavy and 2 light cruisers as well as 9 destroyers.  The Japanese hit the Americans hard early in the battle sinking 3 of the 4 American destroyers and inflicting significant topside damage to South Dakota which caused a power outage and knocked her out of the action.  Washington sailed on undetected by the Japanese and opened a devastating barrage against Kirishima scoring hits with 9 16” shells and 40 5” shell. Kirishima was mortally wounded and was scuttled by her crew the following day.  Washington then drove off the other Japanese ships sparing Henderson Field from certain damage.

Washington blasting Kirishima at the Naval Battle of Guadalcanal 14-15 November 1942

Washington’s victim the IJN Battleship Kirishima

Washington continued operations in the South and Central Pacific until she was damaged in a collision with USS Indiana which resulted in her losing nearly 60 feet from her bow on 1 February 1944. She received temporary repairs before returning to the Puget Sound Naval Shipyard to receive a new bow and other modernizations returning to action in May 1944. She remained in operation against the Japanese the rest of the war. She was decommissioned in 1947 and struck from the Naval Register on 1 June 1960 and sold for scrap.

Various improvements and ideas were suggested while the ships remained in reserve as some in the Navy wished to reactivate them to include lightening them to increase their speed and conversion into Helicopter Carriers all of which were rejected.

Fireworks over the North Carolina in Wilmington (US Navy Photo)

Though the North Carolina’s were a compromise design they performed admirably throughout the war.  They and their brave crews are remembered in Naval History and the preservation of North Carolina has ensured that they will never be forgotten.

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The Battle Fleet that Never Was: The USS Washington, the South Dakota Class and the Lexington Class Battle Cruisers

Artist depiction of the Lexington as Battle Cruiser

Note: This is the first of a series of articles on what might have happened if the Washington Naval Treaty had not been signed. This article is a look at the American fleet that never was, the following articles will be in the alternative history genre looking at a war breaking out in the Pacific in 1937.

Historians almost always muse on what might have been.  One of the most significant events of the years following the First World War was the Washington Naval Conference and Treaty. The treaty called by the President Harding and conducted under the auspices of the League of Nations was the first international disarmament conference and attended by none nations having interests in the Pacific. The major players in the conference from the naval power perspective were the British, Americans, Japanese, French and Italians.  Each nation had an agenda for the conference, for the United States it was to break the Anglo-Japanese naval accord and to limit the Japanese naval build up.  The British, exhausted and financially reeling from the effects of the First World War had a number of goals.  Though they had the largest navy and the most Dreadnaught type battleships and battle cruisers of any Navy many of its ships were obsolete or worn out from wartime service.  They had little capital to put into new ship construction, especially considering the vast resources of the United States which was already well into a vast naval buildup including ships that would be among the largest and most heavily armed in the world.  It was in the interest of Britain to limit the both the number, tonnage and armament of these ships.

Artist impression of South Dakota Class

The treaty which was ratified in 1922 limited the United States and Great Britain to a maximum of 525,000 tons in their battle ship fleets and 125,000 tons in aircraft carriers.  The Japanese agreed to a limit of 315,000 tons and the French and Italians 175,000 tons each.  Tonnage for battleships was limited to a maximum of 35,000 tons with a limitation on guns size to 16 inches.  Since the bulk of the ships planned or being built by the US and Japan exceeded those limits they would be effected more than the British whose post war shipbuilding program had not begun in earnest. For the US this had a dramatic effect on its planned fleet, which if built would have become the dominant Navy of the 1920s and 1930s.  It is fascinating to think what might have happened if the treaty had not been signed and what the battle fleets of the various nations would have looked like in 1941 had war not come sooner.

Plans for South Dakota Class

The American Navy went to war in 1941 with 18 battleships, the most modern of which were the new North Carolina and Washington and the rest averaging over 20 years old in 1941. The most modern of these ships were the Colorado class composed of the Colorado, Maryland and West Virginia each mounting eight 16”/50 guns.  The fourth ship of the class the Washington was sunk as a gunnery target when 75% complete under the terms of the Washington Naval Treaty.

The incomplete USS Washington sinking

However it was a battle force that could have been much larger and far more capable, a force that may not been regulated to convoy escort duties and shore bombardment but instead may have taken on the Imperial Navy on the high seas in battleship combat not seen since Jutland.  Yet this was not to be, the great fleet of super-battleships was never built and only two hulls completed the Lexington and Saratoga which instead of being completed as battle cruisers were completed as aircraft carriers.

Artist impression of South Dakota Class

The Americans had set out to build the largest, most modern and powerful battleships and battle cruisers afloat.  The Navy had already produced the Colorado class super-dreadnaughts which were equal to or superior to any battleships of their era.  The Navy planned for a class of six battle cruisers which would be superior to any similar ship afloat, the Lexington class and a class of six battleships, the South Dakota class mounting twelve 16”/50 guns in triple turrets.

Artist impression of South Dakota Class as they might have appeared in 1938

The two classes were leviathans and to counter them the British made plans for a four ship 48,000 ton class of battleships, the N3 project mounting nine 18” guns and a class of battle cruisers mounting nine 16” guns.  The ships of both classes were designed with their main battery mounted forward in order to save weight on armor.  Both classes were canceled with the signing of the treaty and none were laid down.  It is suggested by some that the G3 battle cruiser design was a ploy to get the United States to agree to the cancellation of its capital ship projects. The guns planned for the G3 class were mounted on the Nelson class battleships which complied with treaty limits.  Although powerful ships they suffered from engineering problems which often reduced their speed from what was designed.  Along with the HMS Hood, the sole ship completed of the four ship Admiral class the Nelson and Rodney were the most modern battleships in the Royal Navy until the King George V class entered service in 1941.  The Japanese planned for eight battleships and eight battle cruisers centered on the two existing Nagato class battleships and 4 Kongo class battle cruisers to be joined by the two ship 40,000 ton Tosa class battleships, the Tosa and the Kaga, of which Kaga was completed as an aircraft carrier. They were to be joined by the 4 improved Tosa class or Kii class fast battleships of 42,000 which were ordered but never laid down.  These were to be joined by the four ship Amagi class battle cruiser class.  Amagi was destroyed during the Tokyo earthquake of 1922 and scrapped and Akagi completed as an aircraft carrier.  All of the planned Japanese ships were to mount ten 16” guns in five twin turrets.

Lexington Class final design drawing

The American ships were to be powerful and based on main battery, protection and speed they would have acquitted themselves well had they been built.  The Japanese ships would have had a speed advantage over the South Dakota’s but this would have been offset by the gun power and protection of the latter.  The American Lexington class would have been faster than any of their competitors.

South Dakota Class Design Specifications
Displacement: 43,200 tons normal
Dimensions: 684 x 106 x 33 feet/208.5 x 32.3 x 10.1 meters
Propulsion: Turbo-electric, 12 285 boilers, 4 shafts, 50,000 shp, 23 knots
Crew: 1191
Armor: 8-13.5 inch belt, 3.5 inch deck, 4.5-13.5 inch barbettes, 5-18 inch turrets, 8-16 inch CT
Aviation: none
Armament: 4 triple 16″/50cal, 16 6″/53cal, 8 3″/50cal AA, 2 21 inch torpedo tubes (submerged)

The six ships in the Class, South Dakota, Indiana, Montana, North Carolina, Iowa and Massachusetts were all scrapped in accordance with the treaty when partially complete, the North Carolina being in the most advanced stage of construction, 37.8% when construction was halted.

Lexington class Battle Cruiser Design Specifications

Displacement 43,500 Tons, Dimensions, 874′ (oa) x 105′ 5″ x 31′ (max).
Armament 8 x 16″/50 16 x 6″/53 4 x 3″8 x 21″ torpedo tubes
Machinery, 180,000 SHP; G.E. Geared Turbines with Electric Drive, 4 screws
Speed, 35 Knots, Crew 1500

The ships with the exception of the Lexington and Saratoga were scrapped incomplete.  All were to be named after famous warships or battles, and the Constellation, Constitution, Ranger and the United States were to be named after some of the most illustrious ships ever to serve in the US Navy.

If all of the ships, including the Washington of the Colorado class been completed the US Navy would have had eight battleships and six battle cruisers mounting 16 inch guns to compliment the nine battleships of the Nevada, Pennsylvania, New Mexico and California classes which all mounted 14 inch batteries.  The fleet would have been superior to either the Royal Navy or the Imperial Japanese Navy even with the ships planned by those navies.  Economically the United States was the only nation in the world capable of sustaining a naval arms race of this magnitude, the British economy and political will would have been unable to sustain it and the limited industrial capacity and dependence on the United States for raw materials and machine tools needed to construct their ships would have limited their ability to produce such a fleet. Without the conversion of the Lexington, Saratoga and their Japanese counterparts the Akagi and Kaga into aircraft carriers the development of the carrier would likely have gone slower and that type of ship may not have risen to the prominence that they gained during the Second World War.

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