The official birth date of the Army National Guard as a reserve component of the Army is December 13, 1636. On this date, the Massachusetts colonial legislature directed that the colony’s existing militia companies be organized into three regiments. This date is recognized based upon the Department of Defense’s practice of adopting the dates of initial authorizing legislation for organized units as the birthdates of the active and reserve components of the armed services.

Happy 389th Birthday to the U.S. National Guard!