USS Helena CL-50 was a cruiser of the St. Louis class - a sub-group of the larger Brooklyn class. Commissioned in 1939, she served as part of Cruiser Division 9 and was present at Pearl Harbor when the Japanese attacked on December 7, 1941. Repaired after a torpedo hit there, she served until the Battle of Kula Gulf in July of 1943, when she sank with the loss of 168 of her sailors after being struck by three torpedos.

Documents:
Attack on Pearl Harbor - Personal accounts by Engineer Force officers

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