The Japanese attack on Pearl Harbor was planned as the initial step of their Pacific campaign. At the time of the attack, the Oklahoma was outboard of the battleship Maryland, alongside Ford Island. She was struck on the port side by four to nine torpedoes, which caused the ship to capsize quickly and come to rest on the bottom. The righting and refloating of the capsized battleship Oklahoma was the largest of the Pearl Harbor salvage jobs, and the most difficult.
Refloating operations were commenced by installing four independent patches in breaches of the hull. To right her, the first pull began on March 8, 1943, the final pull was on May 20, 1943 – it took 74-days to turn the ship over. The Oklahoma was later sold to the Moore Drydock Co of Oakland, California, for scrapping. On May 17, 1947, while under tow, the Oklahoma sank 540-miles out of Pearl Harbor with no one on board.