(a) Armed Forces. The Army, the Navy, the Air Force, the Marine Corps.
(b) State. Includes the 50 United States, U.S. Territories, District of Columbia, and the Commonwealth of Puerto Rico.
(c) Active Duty. Full-time duty in the active Military Service of the United States; Includes full-time training duty, annual training duty, active duty for training, and attendance, while in the active Military Service, at a school designated as a Service school by law or by the Secretary of the Military Department concerned.
(d) Operating Forces. Those forces whose primary missions are to participate in combat and the integral supporting elements thereof.