Vietnam War When the Army abandoned battle groups in favor of brigades and battalions in 1963, the 31st Infantry's 1st and 2nd Battalions were reactivated in South Korea, the 3rd Battalion remained in the Army Reserve, and the 5th Battalion replaced the 2nd Battle Group at Fort Rucker. When the Vietnam War came, two more battalions of the 31st Infantry were formed. The 4th Battalion was formed at Fort Devens, Massachusetts in 1965 and the 6th Battalion was formed at Fort Lewis, Washington in 1967.
Vietnam War When the Army abandoned battle groups in favor of brigades and battalions in 1963, the 31st Infantry's 1st and 2nd Battalions were reactivated in South Korea, the 3rd Battalion remained in the Army Reserve, and the 5th Battalion repl,aced the 2nd Battle Group at Fort Rucker. When the Vietnam War came, two more battalions of the 31st Infantry were formed The 4th Battalion was formed at Fort Devens, Massachusetts in 1965 and the 6th Battalion was formed at Fort Lewi.s Washington in 1967.