Candidates' School Tactics Section. Post-World War II Assigned to Camp Pendleton in January 1947, Lieutenant Colonel Walt served as assistant chief of staff, G-3, 3rd Marine Brigade, and then as G-3, 1st Marine Division. In November 1947, he assumed duty as operations and training officer, 1st Provisional Marine Brigade on Guam, and later served as Chief of Staff of that organization from February to April 1949. Returning to Marine Corps Schools, Quantico, in May 1949, he saw duty as a battalion commander with the Special Training Regiment; and in September, he entered the Amphibious Warfare School, Senior Course. On completing the course in June 1950, he remained at Marine Corps Schools to serve as chief of Tactics Section, S-3, and finally, executive officer, The Basic School. He was promoted to colonel in November 1951. Korean War Colonel Walt was ordered to South Korea in November 1952. He was in combat with the 1st Marine Division until August 1953, serving consecutively as commanding officer, 5th Marines, assistant chief of staff, G-3, and chief of staff of the division. He received both the Legion of Merit with Combat "V" and the Bronze Star Medal with Combat "V", for exceptionally meritorious service during this assignment. The Republic of Korea government also awarded Colonel Walt the Ulchi Medal and the Ulchi Medal with Silver Star for this period of service. Post-Korea On arrival at Marine Corps Schools, Quantico, in August 1953, Colonel Walt saw duty as director, Advanced Base Problem Section, Marine Corps Educational Center, through May 1954, followed by duty as commanding officer, Officers' Basic School, until August 1956. He also served as a Member of the Advanced Research Group, Marine Corps Educational Center, until June 1957. Transferred to Washington, D.C., Colonel Walt served as assistant director of personnel until August 1959, then entered the National War College, Washington, D.C.. He completed the course in June 1960. In July 1960, Colonel Walt began a one-year assignment as Marine Corps representative on the Joint Advanced Study Group of the Joint Chiefs of Staff. Upon completing this assignment, he was promoted to brigadier general and reported for duty at Camp Lejeune as assistant division commander, 2nd Marine Division. In September 1962, General Walt returned to Marine Corps Schools, Quantico, serving as director of the Marine Corps Landing Force Development Center there until May 1965. Vietnam War In May 1965, Walt was promoted to major general,