Both ships had short service careers. "Bismarck" conducted only one operation, Operation Rheinübung, a sortie into the North Atlantic to raid supply convoys sent from North America to Great Britain. During the operation, she destroyed the British battlecruiser and damaged the new battleship in the Battle of the Denmark Strait. "Bismarck" was defeated and sunk in a final engagement after a three-day chase by the Royal Navy. Disagreements over the cause of the sinking persist with chiefly British sources claiming responsibility for the sinking of the ship. Evidence reviewed by Robert Ballard and James Cameron indicates that her loss was most likely due to scuttling as originally claimed by her surviving crew-members.