Pallada was the lead ship in the Pallada class of protected cruisers in the Imperial Russian Navy.
She was sister to cruiser Aurora.
In August 1904 at the Battle of the Yellow Sea, after being struck by a torpedo, Pallada managed to make her way back to Port Arthur, and was thus unable to break through the Japanese blockade along with a number of other Russian cruisers. Her guns were removed to help strengthen the land defenses and most of her crew was reassigned to serve as infantry. Pallada was sunk by Japanese 11-inch siege howitzers on 8 December 1904.
After the end of the war, the wreck of Pallada was raised and towed to Japan, where it was repaired and commissioned into the Imperial Japanese Navy as a prize of war. Renamed Tsugaru, she served as a training vessel and later as a minelayer until decommissioned in 1922.

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Battleship Navarin, a pre-dreadnought battleship built for the Imperial Russian Navy in the late 1880s.
She was assigned to the 2nd Pacific Squadron to relieve the Russian forces blockaded in Port Arthur. During the Battle of Tsushima in May 1905, she was sunk by Japanese destroyers which spread twenty-four linked mines across her path during the night. Navarin struck two of these mines and capsized with the loss of most of her crew.

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Petropavlovsk (Петропавловск) was the lead ship of the Petropavlovsk class of pre-dreadnought battleships built for the Imperial Russian Navy. Petropavlovsk participated in the Boxer Rebellion, and during the Russo-Japanese War was the flagship of the First Pacific Squadron, taking part in battles against the Imperial Japanese Navy. On 13 April 1904, the battleship was sunk after striking two mines near Port Arthur. 652 men and 27 officers died, including the Vice Admiral Stepan Makarov and renowned war artist Vasily Vereshchagin. The loss of Petropavlovsk and Makarov greatly hindered the Russians in the war

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