Date Duration Operation Name Unit(s) – Description Location VC–NVA KIA's Allied KIA's
           
Jan 1 – Apr 31 1971 Operation Keystone Robin (Charlie)[1] Redeployment of the 1st Cavalry Division, 2nd Brigade, 25th Infantry Division and 11th Armored Cavalry Regiment Hq Regt, 1/11 H Co 2/11, 3/11, from South Vietnam to the United States