 He later served as chief of staff of the II Corps, then fighting in Tunisia, under the command of Lieutenant General George S. Patton Jr., later replaced by Major General Omar Bradley.In April 1943, when the campaign in North Africa was coming to an end, he was promoted to the two-star general officer rank of major general and a month later became commanding general (CG) of the 2nd Armored Division, replacing Major General Ernest N. Harmon.At the age of 47, Gaffey was one of the youngest division commanders in the U.S. Army at the time.