O'Neill, hull DE-188, belonged to the Cannon class of destroyer escorts. Federal Shipbuilding and Drydock Company, at Port Newark, New Jersey, laid her down on 26 August 1943 and launched her on 14 November 1943. The Navy commissioned her on 6 December 1943. Her first commanding officer was Lieutenant David Spencer Bill Jr.
Her Pacific duty took her to Iwo Jima, New Guinea, and Okinawa.
Her commissioned service ended on 2 May 1946. Another navy received her later. She went to the breakers later.
