~ The FReeper Canteen Presents ~ ~ Happy 71th Birthday, United States Air Force ~ ~ September 18, 2018 ~ Canteen Mission Statement Showing support and boosting the morale ofour military and our allies' militaryand family members of the above.Honoring those who have served before. The United States Air Force became a separate military service on September 18, 1947, with the implementation of the National Security Act of 1947. The Act created the National Military Establishment, later renamed the United States Department of Defense, which was composed of three branches, the Army, Navy and a newly created Air Force....