High Quality Content by WIKIPEDIA articles! The Russian battleship Petropavlovsk (Russian: Петропавловск) was the third of the four Gangut-class dreadnoughts, the first Russian class of dreadnoughts, built before World War I. She was named after the Russian victory over the British and the French in the Siege of Petropavlovsk in 1854. The ship was completed during the winter of 1914–15, but was not ready for combat until mid-1915. Her role was to defend the mouth of the Gulf of Finland against the Germans, who never tried to enter, so she spent her time training providing cover for minelaying operations. Her crew joined the general mutiny of the Baltic Fleet after the February Revolution of 1917 and she was the only dreadnought available to the Bolsheviks for several years after the October Revolution of 1917. She bombarded the rebellious garrison of Fort Krasnoye Gorka and supported Bolshevik light forces operating against British ships supporting the White Russians in the Gulf of Finland in 1918–19. Later, her crew joined the Kronstadt Rebellion of 1921 and she was renamed Marat after the rebellion was crushed.