Many armies, including the U.S. Army, formerly distinguished between "volunteers" enlisted during a war, and "regulars" who served on long-term basis. Troops raised as state militia were always "volunteers" (even when recruited by conscription), while "U.S." troops could be volunteers or regulars. 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 should not be confused with brevet rank.