3rd Battalion 21st Artillery

The 3rd Battalion, 21st Artillery was originally constituted in the Regular Army as part of the 21st Field Artillery Regiment in 1916. During World War II, its parent regiment served in the European Theater, participating in key campaigns. Reactivated and reorganized during the Vietnam War, the 3rd Battalion, 21st Artillery provided direct fire support for infantry operations, notably supporting the Americal Division in Quang Ngai and Quang Tin provinces. The battalion earned multiple campaign streamers and unit commendations before being inactivated after the war.