After a brief tour as a senior school instructor, Marine Corps Schools, Quantico, Wilson departed for Korea to serve as assistant G-3, 1st Marine Division. In August 1955, he returned to the United States with the 1st Division, and was appointed commanding officer, 2nd Battalion, 5th Marines, 1st Marine Division. In March 1956, Wilson was assigned to Headquarters Marine Corps (HQMC), serving two years as head, Operations Section, G-3 Division. He then returned to Quantico, first as commanding officer of the Test and Training Regiment, and later as commanding officer of The Basic School.