One of the last naval actions in the Pacific War, the Action of July 24, 1945 was a Japanese victory. Among the suicide weapons implemented by the Japanese at the end of the War were kaitens, manned torpedoes. The I-53 was manned with kaitens, and launched six of them on an attack on an American troop convoyed escorted by Destroyer Escort USS Underhill, six sub chasers and a patrol boat. The Underhill took out two of the kaitens before being sunk by the explosion of the second kaiten, as it was rammed by the Underhill. The Underhill suffered casualties of 112 killed and 122 wounded.