Do not include training for the Reserves or National Guard as active duty. Each branch of the military has both a regular and a reserve component.
Active duty does include activation, as explained below.
It also does not include activation for local disasters such as floods, earthquakes, riots, postal strikes, etc. The military reserves consist of the Army Reserve, Naval Reserve, Marine Corps Reserve, Air Force Reserve, and the Coast Guard Reserve. The National Guard consists of the Army National Guard and the Air National Guard. All other parts of the U.S. Armed Forces are known as regular components of the U.S. Army, Navy, Air Force, Marine Corps, or Coast Guard. Mark only periods of active-duty service.