 In June 1952, he became regimental executive officer, and from June until December 1953, he served as personnel assistant to the division, whereupon he was sent to the Joint Landing Force Board at Camp Lejeune, North Carolina.In March 1955, he was sent to Tokyo under the Far East Command as the chief of Intelligence Plans Section, where he was promoted to colonel and awarded the Army Commendation Medal.Karch then completed the Senior Course at the Quantico Marine Corps Schools in June 1958, whereupon he was assigned to the 2nd Marine Division as regimental commander of the 10th Marines as well as the assistant chief of staff until July 1961.