June, 1963: The Secretary of the Navy approved the establishment of Marine Medium Helicopter Squadron 365.
July 1, 1963: HMM-365 is established at Marine Corps Air Facility (MCAF), Santa Ana, California. The new squadron is equipped with HUS-1 (later re-designated UH-34D) helicopters.
September 15, 1963: First Sergeant Howard G. Force took over the top enlisted billet. This is his first air wing assignment, having served his entire Marine Corps career with the infantry.
Major Warren Gustafson, Executive Officer; First Sergeant Howard Force, First Sergeant; Lieutenant Colonel Joseph Koler, Jr., Commanding Officer
October 2, 1963: Lieutenant Colonel Joseph Koler Jr. assumes command of the squadron. Entering the Marine Corps during the Second World War, LtCol Koler had also seen duty in China and Korea as an infantry officer.
November 17, 1963: Deployment to Marine Corps Air Facility (MCAF), Yuma, Arizona, returning to MCAF Santa Ana, Novermber 24.