USACIDC was established as a United States Army command in 1971 and is headquartered at Marine Corps Base, Quantico, Virginia. Worldwide, the organization has slightly fewer than 3,000 soldiers and civilians, of whom approximately 900 are special agents. The initialism "USACIDC" is used to refer to the Army command itself, while criminal investigation personnel and operations are commonly referred to using the shortened initialism "CID", which has its history in the original Criminal Investigation Division formed during World War I and is still retained today for continuity purposes.