Brazilian battleship São Paulo vs HMS Swiftsure (1903)

São Paulo was a dreadnought battleship designed and built by the British companies Armstrong Whitworth and Vickers, respectively, for the Brazilian Navy. It was the second of two ships in the Minas Geraes class, and was named after the state and city of São Paulo. São Paulo was launched on 19 April 1909 and commissioned on 12 July 1910. Soon after, it was involved in the Revolt of the Lash (Revolta de Chibata), in which crews on four Brazilian warships mutinied over poor pay and harsh punishments for even minor offenses. After entering the First World War, Brazil offered to send São Paulo and its sister Minas Geraes to Britain for service with the Grand Fleet, but Britain declined since both vessels were in poor condition and lacked the latest fire control technology. In June 1918, Brazil sent São Paulo to the United States for a full refit that was not completed until 7 January 1920, well after the war had ended. On 6 July 1922, São Paulo fired its guns in anger for the first time when it attacked a fort that had been taken during the Tenente revolts. Two years later, mutineers took control of the ship and sailed it to Montevideo in Uruguay, where they obtained asylum. In the 1930s, São Paulo was passed over for modernization due to its poor condition—it could only reach a top speed of 10 knots (19 km/h; 12 mph), less than half its design speed. For the rest of its career, the ship was reduced to a reserve coastal defense role. When Brazil entered the Second World War, São Paulo sailed to Recife and remained there as the port's main defense for the duration of the war. Stricken in 1947, the dreadnought remained as a training vessel until 1951, when it was taken under tow to be scrapped in the United Kingdom. The tow lines broke during a strong gale on 6 November, when the ships were 150 nmi (280 km; 170 mi) north of the Azores, and São Paulo was lost.

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HMS Swiftsure, originally known as Constitución, was the lead ship of the Swiftsure-class pre-dreadnought battleships. The ship was ordered by the Chilean Navy, but she was purchased by the United Kingdom as part of ending the Argentine–Chilean naval arms race. In British service, Swiftsure was initially assigned to the Home Fleet and Channel Fleets before being transferred to the Mediterranean Fleet in 1909. She rejoined Home Fleet in 1912 and was transferred to the East Indies Station in 1913, to act as its flagship. After the beginning of World War I in August 1914, Swiftsure escorted troop convoys in the Indian Ocean until she was transferred to the Suez Canal Patrol in December. After defending the Canal in early 1915 from Ottoman attacks, the ship was then transferred to the Dardanelles in February and saw action in the Dardanelles Campaign bombarding Ottoman fortifications. Swiftsure was assigned to convoy escort duties in the Atlantic from early 1916 until she was paid off in April 1917 to provide crews for anti-submarine vessels. In mid-1918, the ship was disarmed to be used as a blockship during a proposed second raid on Ostend. Swiftsure was sold for scrap in 1920.

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