 She was raised the following month and thereafter transferred to the United States Navy as a war prize. She was formally taken over on 11 March 1920 in England and commissioned into the US Navy on 4 June. Frankfurt was towed to the United States. The ship was ultimately expended as a bomb target on 18 July 1921 for United States Army Air Service and U.S. Navy bombers off Cape Henry, Virginia. The attacks started with small 250-pound (110 kg) and 300 lb (140 kg) bombs, which caused minor hull damage. The bombers then changed over to larger 550 lb (250 kg) and 600 lb (270 kg) bombs; Army Air Service Martin MB-2 bombers hit Frankfurt with several of the 600 lb bombs and sank the ship at 18: 25.
