HMS Baralong was a cargo steamship that was built in England in 1901, served in the Royal Navy as a Q-ship in the First World War, was sold into Japanese civilian service in 1922 and scrapped in 1933. She was renamed HMS Wyandra in 1915, Manica in 1916, Kyokuto Maru in 1922 and Shinsei Maru No. 1 in 1925. As a Q-ship, Baralong was both successful and controversial. In 1915 she sank two U-boats: U-27 in August and U-41 in September, in two engagements that are known as the Baralong incidents. The circumstances of the sinkings led Germany to describe both incidents as war crimes.