As a separate STARC headquarters detachment in accordance with National Guard Regulation 10–2, the primary mission of the 74th Troop Command is to command, control, and supervise Army National Guard units attached to the troop command and to provide manned, trained and equipped units capable of immediate expansion to war strength and available for service in time of war or national emergency or when appropriate to augment the active army.

Comprising some of the most acclaimed units in the Army's rich history, the Command has heritage dating back to the DC Militia of the 18th century and its Revolutionary War roles.

The DCNG's all black 1st Separate Infantry Battalion[1] was one of World War I's most trusted fighting units.

Naming their company orderly room "Blair House," they flew a DC flag over the Korean peninsula on 8 December 1951.

[2] 74th Troop Command heritage continued to deploy overseas to every major conflict in support of the United States Army throughout the Cold War era.