from September 1956 to August 1958, followed by Armed Forces Staff College at Norfolk, Virginia, from August 1958 to February 1959. His next assignment was at Fort Sam Houston, from February 1959 to August 1961, followed by Army War College at from August 1961 to September 1962. Treadwell next completed a degree program at the University of Omaha from September 1962 to July 1963, and then served on as the staff of United States Army Europe and as a battalion commander in West Germany from July 1963 to July 1966. He served as the Chief of the Army Infantry Center at Fort Benning from July to November 1966, and then served as commander of the 197th Infantry Brigade at Fort Benning until August 1968. Vietnam War Treadwell served as Chief of Staff of the Americal Division in Vietnam from October 1968 to March 1969, and then as commander of the 11th Infantry Brigade in Vietnam from March to September 1969. He served in Vietnam where he made over 100 parachute jumps. He participated in three campaigns in Vietnam: the Vietnam Counteroffensive Phase 5, Vietnam Counteroffensive Phase 6 and the Tet Offensive. Post war In June 1970, he was presented the Oklahoma Distinguished Service Cross in recognition of extraordinary heroism involving great personal danger and risk of life in the line of military duty and for outstanding service to the Oklahoma Army National Guard during the period 1941 till 1970. He was presented the state's highest decoration for extraordinary heroism was made by then Governor Dewey Bartlett. After Vietnam, Treadwell served with Headquarters Fourth United States Army (redesignated Fifth United States Army in June 1971) at Fort Sam Houston from October 1969 to June 1972, followed by service as Senior Army Advisor to the U.S. Army Reserve at Columbia, South Carolina, from July 1972. After more than 33 years service, Treadwell retired on Wednesday, Feb. 27, 1974 in retirement ceremonies held at the Fort Jackson Officer's Open Mess at 10:30 A.M. Major General William H. Blakefield, commander, Readiness Region II, presented Treadwell with the third oak leaf cluster for his Legion of Merit, for exceptional meritorious conduct from July 1972 through February 1974, while assigned as the Senior Army Advisor, 120th Army Reserve Command, U.S. Army Readiness Region III. Treadwell was also presented a Certificate of Appreciation from Creighton Abrams, the Chief of Staff of the United States Army. Later life