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War History Online
The Untold Story of Why the US Navy Never Built These World War II-Era Battleships
By Ryan McLachlan,
19 days ago
During World War II, several legendary battleships emerged, including the Bismarck , HMS Hood (51), Yamato , Roma (1940) and USS Iowa (BB-61). However, this period also marked the decline of battleships' dominance, as can be seen by the abandonment of many battleship projects during the conflict.
In World War I , battleships demonstrated their power in battles like Dogger Bank and Jutland, underscoring their strategic importance and prompting nations to embark on constructing more advanced capital ships. For instance, the United States enacted the Naval Act of 1916 , known as the Big Navy Act, which aimed to enhance the capabilities of the US Navy.
It authorized the construction of 10 battleships, six battlecruisers, 10 scout cruisers, 50 destroyers, and 67 submarines. Despite plans to start in 1919 and finish within four years, the envisioned fleet never materialized
This story reflects the fate of canceled battleship projects during World War II.
Washington Naval Treaty
The Washington Naval Treaty aimed to prevent a naval arms race by setting limits on naval construction. Negotiated during the Washington Naval Conference from November 1921 to February 1922, the treaty was signed by the United Kingdom, US, France, Italy, and Japan.
Signing of the Washington Naval Treaty, 1922. (Photo Credit: Unknown Author / Wikimedia Commons / Public Domain)
It established specific tonnage allowances for battleships and aircraft carriers for each nation. The United States, for instance, could build battleships up to a total tonnage of 525,000. Additionally, the treaty stipulated that no single battleship could exceed 35,000 tons or mount guns larger than 16 inches in caliber.
These restrictions applied to both future constructions and vessels currently under construction, leading to the scrapping or conversion of ships from all five nations in accordance with the treaty's terms.
Lexington -class battlecruisers
The Naval Act of 1916 ushered in the Lexington -class, slated to be the sole battlecruiser in the US Navy's fleet. Originally, six vessels were slated for construction, starting in 1921. However, adherence to treaty obligations led to the cancellation of the final four, still in their early stages, while the first two were repurposed into the aircraft carriers USS Lexington (CV-2) and Saratoga (CV-3).
Artist's depiction of the Lexington -class, 1919. (Photo Credit: F. Muller / US Navy / Wikimedia Commons / Public Domain)
Initially, the Lexington -class battlecruisers were designed with a complement of ten 14-inch and eighteen 5-inch guns, capable of achieving a top speed of 40 MPH. Later modifications reduced these weapons to eight 16-inch and sixteen 6-inch guns, with a slightly lower top speed of 38.26 MPH. These alterations aimed to strengthen firepower while incorporating more armor, albeit at the expense of speed.
Both Lexington and Saratoga served in World War II
Other armaments were to be eight 3-inch Mk 11 anti-aircraft guns and eight 21-inch torpedo tubes. The Lexington -class would also be powered by a turbo-electric propulsion system, first adopted by the USS New Mexico (BB-40).
USS Lexington (CV-2) under construction after her conversion, 1925. (Photo Credit: Naval Historical Center / Wikimedia Commons / Public Domain)
Despite their almost-uncertain futures, Lexington and Saratoga both went on to serve during the Second World War . The former was sunk during the Battle of the Coral Sea . The latter survived, despite being torpedoed twice, and was used as a target during Operation Crossroads .
South Dakota -class battleships
The South Dakota -class battleships were designed to compete with their British and Japanese counterparts, which boasted speeds of up to 26.47 MPH. Authorized in 1917, the class was intended to feature six vessels.
Artist's depiction of a South Dakota -class battleship. (Photo Credit: F. Muller / US Navy / Wikimedia Commons / Public Domain)
Construction was initially postponed to incorporate improvements following the Battle of Jutland . It was further delayed as destroyers and other ships were seen as more of a priority in combatting German U-boats in the North Atlantic.
Unfinished South Dakota -class ships were scrapped
The South Dakota -class was to be armed with twelve 16-inch guns in four triple-gun turrets, sixteen 6-inch guns, four .50-caliber anti-aircraft guns and two 21-inch torpedo tubes. Propulsion, like the Lexington -class, would be via a turbo-electric system.
USS South Dakota (BB-57) under construction. (Photo Credit: Dan Treadwell / NavSource / Wikimedia Commons / Public Domain)
Construction finally started in 1920, but, two years later, with the signing of the Washington Naval Treaty, was brought to a standstill. In 1923, the unfinished ships were scrapped, and their boilers and armor used to improve older vessels. Their guns were given to the US Army.
Montana -class battleships
The intended successor to the Iowa- class, the Montana -class was to be larger, better protected and more powerful than any battleship the US Navy had ever operated. The five-ship class was initially designed before the start of the Second World War. Construction was intended to begin during the conflict, but was canceled.
Model of a Montana -class battleship. (Photo Credit: U.S. Naval Historical Center / Wikimedia Commons / Public Domain)
Montana -class battleships would have had twelve 16-inch Mk 7 guns as their main armament, housed in four three-gun turrets - two forward-facing and two rearward-facing. This would allow them to surpass the Imperial Japanese Navy's (IJN) Yamato as the battleship with the most powerful broadside.
The class would have also carried twenty 5-inch guns in 10 turrets, as well as Bofors 40 mm and Oerlikon 20 mm anti-aircraft guns. The battleships were to be powered by eight boilers and four steam turbines.
The cancelation of the Montana -class was the beginning of the end
The Montana- class would be armored more than any other American battleship of the era. Despite the increase in size, this addition would have protected against vessels with similar-caliber guns, making them the only US ships with this ability.
USS Iowa (BB-61), 1984. (Photo Credit: PHAN J. Alan Elliott / US Navy / Wikimedia Commons / Public Domain)
In May 1942, construction was ordered to begin on the Montana- class. Before anything started, however, the vessels were postponed, in favor of building more Essex- class aircraft carriers and Iowa- class battleships.
In July 1943, the Montana -class was officially canceled. The cancellation of these capital ships signaled the slow decline of the battleship. World War II was to be the final conflict where they played a definitive role. After the Battles of the Coral Sea and Midway, which displayed the importance of airpower and aircraft carriers, the final rivets were put in the battleship’s coffin.
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