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World War II: USS Grouper torpedoes Lisbon Maru, not knowing that she is carrying British prisoners of war from Hong Kong.

Historical image related to World War II: USS Grouper torpedoes Lisbon Maru, not knowing that she is carrying British prisoners of war from Hong Kong. from October 1, 1942

Related Wikipedia articles

USS Grouper

Gato-class submarine (1941 to 1968)

USS Grouper (SS/SSK/AGSS-214), a Gato-class submarine, was the only ship of the United States Navy to be named for the grouper.
Source: Wikipedia (CC BY-SA)

Lisbon Maru

Japanese cargo liner and troopship

Lisbon Maru (りすぼん丸) was a Japanese cargo liner built at Yokohama in 1920 for a Japanese shipping line. During World War II, the ship was requisitioned by the Japanese Army and turned into an armed troopship. On her final voyage, Lisbon Maru was being used to transport prisoners…
Source: Wikipedia (CC BY-SA)