Military volunteer

United States

In the United States troops raised as state militia were always described as "volunteers", even when recruited by conscription. Both US volunteers and regulars were referred to as "U.S." troops. The rank of an officer in a volunteer unit was separate from his rank (if any) as a regular, and usually higher. When the volunteer forces were disbanded at the end of the war, officers with both kinds of commission reverted to their "regular" rank. For instance, George Armstrong Custer became a brigadier general of volunteers during the American Civil War, but when the war ended, he reverted to captain. (He was later promoted to lieutenant colonel.) Volunteer rank is not the same as brevet rank.