HMS L55

In 1919 L55 was sunk in the Baltic Sea by Bolshevik vessels while serving as part of the Allied intervention in the Russian Civil War. The submarine was raised in 1928 and repaired by the Soviets. After being used for training, she finally was scrapped in the 1950s. HMS L55 was based at Tallinn, Estonia as part of the Baltic Battle Squadron, which was supporting the Baltic states fighting for independence. On 9 June 1919 in Caporsky Bay in the Gulf of Finland L55 attacked two 1,260-ton Bolshevik Orfey-class minelayer-destroyers, Gavriil and Azard. HMS L55 missed her targets and was forced into a British-laid minefield. Soviet sources stated Azard sank her by gunfire. If she was sunk by gunfire, L55 was the only British submarine sunk by hostile Soviet vessels.