1st Battalion, 83rd Artillery, Vietnam Veteran, with Vietnam Service Ribbons - HoodieThe 83rd Field Artillery Regiment is a regiment of the Field Artillery Branch of the United States Army. The 1st Battalion, 83rd Artillery was formed in 1966 at Fort Sill, Oklahoma. The battalion departed for Vietnam in October 1966 and remained there until 1971 when the unit was stood down. In Vietnam, the 83rd was originally at Bear Cat, Nui Dat and Xun Lc but later moved to many other locations in Vietnam.