The Russian battleship Petropavlovsk () 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 and 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 mutinous garrison of F