戦略兵器制限交渉
Butler entered the Armed Forces Staff College in July 1973 and, after graduating in February 1974, was assigned as air operations officer, International Relations Branch, Directorate of Plans, Strategic Arms Limitation Talks, Headquarters U.S. Air Force, Washington, D.C. Remaining at the Pentagon, he served from October 1974 to September 1975 as executive officer for the special assistant for strategic initiatives, Office of the Deputy Chief of Staff, Plans and Operations, Air Force headquarters.