Following fitting out at Boston, Massachusetts, "Pheasant" helped to protect convoys along the eastern and gulf coasts of the United States beginning in early 1943. Immediately preceding the Normandy invasion of 6 June 1944, she swept dangerous mines from fire support areas used by the battleships and . From 29 June until her departure for Oran, Algeria, on 15 July 1944, she cleared areas to be used for the invasion of Cherbourg, France. Later, in the Mediterranean, she made exploratory sweeps prior to the invasion of southern France. She swept successfully in the Mediterranean until May 1945 when she received orders to return to the United States.