"Recent discussions about granting direct commissions as field-grade officers (major, lieutenant colonel, and colonel) to people with highly-desirable civilian experience are often couched in terms of "that was done during World War II." Responses that such wartime commissions were temporary commissions in the Army of the United States (AUS), rather than in the Regular Army (RA), are usually met with blank looks. During World War II, almost all Army commissions--the authorization from the government that gives a military officer the right to command--were temporary AUS commissions. The AUS commission saw continued use in limited numbers after the war, but has been in hiatus since the early 1980s. The AUS commission was the last of several types of temporary commissions the United States government used to expand the Army officer corps during wartime. The use of temporary commissions to provide enough officers to lead the quickly growing ranks was the standard practice during most of the major wars fought by the United States until after the end of the Vietnam War, varying only in the type of commission and method for raising additional wartime forces. Only since 1980 has the US Army sought to wage war without issuing some sort of temporary commission to expand the officer corps"-- Provided by publisher.

Militia --Volunteers -- The National Guard -- The National Army -- The Reserve -- The Army of the United States -- The active Army.