4th Battalion, 9th Infantry (Infantry)Arrived Vietnam: 29 April 1966
Departed Vietnam: 8 December 1970 Previous Station: Alaska via Hawaii * Authorized Strength: 1966 - 829 / 1968-971 / 1970 - 920 The 4th Battalion, 9th Infantry ("Manchu") was part of the 25th Infantry Division in Vietnam. Location: Cu Chi Service: April 66 - Feb. 68 Major Command: 1st Brigade, 25th Infantry Div. Location: Tay Ninh Service: March 68 - May 68 Major Command: 1st Brigade, 25th Infantry Div. Location: Tay Ninh/Duc Hoa Service: June 68 Major Command: 1st Brigade, 25th Infantry Div. Location: Tay Ninh Service: May 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Cambodia Service: May 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Katum/Cambodia Service: June 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Tay Ninh Service: July 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Dau Tieng Service: Aug. 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Tri Tam Service: Sept. 70 Major Command: 1st Brigade, 25th Infantry Div. Location: Dau Tieng Service: Oct. 70 - Dec. 70 Major Command: 1st Brigade, 25th Infantry Div. * Withdrawn from Alaska 22 January 1966 where it had been part of the 171st Infantry Brigade. 4th Battalion, 12th Infantry (Light Infantry)Arrived Vietnam: 29 April 1966
Departed Vietnam: 8 December 1970 Previous Station: Alaska via Hawaii Authorized Strength: 1966 - 829 / 1968-971 / 1970 - 920 The 4th Battalion, 12th Infantry served with 199th Infantry Brigade. Location: Song Be Service: Dec. 66 - Feb. 67 Major Command: 199th Infantry Brigade Location: Long Binh Service: March 67 Major Command: 199th Infantry Brigade Location: Bien Hoa Service: April 67 - June 67 Major Command: 199th Infantry Brigade Location: Long Binh/Cat Lai Service: July 67 - Sept. 67 Major Command: 199th Infantry Brigade Location: Long Binh/Phu My Service: Oct. 67 - Jan. 68 Major Command: 199th Infantry Brigade Location: Long Binh/Saigon Service: Feb. 68 Major Command: 199th Infantry Brigade Location: Gao Ho Nai/Bien Hoa Service: March 68 Major Command: 199th Infantry Brigade Location: Gao Ho Nai Service: April 68 - June 68 Major Command: 199th Infantry Brigade Location: Long Binh Service: July 68 - Oct. 68 Major Command: 199th Infantry Brigade Location: Long Binh/Saigon Service: Nov. 68 - June 69 Major Command: 199th Infantry Brigade |
Location: Long Binh/Courtenay
Service: July 69 - Aug. 69 Major Command: 199th Infantry Brigade Location: Long Binh/Xuan Loc Service: Sept. 69 - July 70 Major Command: 199th Infantry Brigade Location: Long Binh/Gia Ray Service: Aug. 70 - Sept. 70 Major Command: 199th Infantry Brigade Location: Long Binh Service: Oct. 70 Major Command: 199th Infantry Brigade 4th Battalion, 21st Infantry (Light Infantry)Arrived Vietnam: 11 July 1965
Departed Vietnam: 8 April 1970 Previous Station: Fort Riley Authorized Strength: 1966 - 829 / 1968-971 / 1970 - 920 The 4th Battalion, 21st Infantry ("Gimlet") was activated 1 November 1967 in Hawaii to serve as a fourth maneuver battalion of the 11th Infantry Brigade (Light). On 15 February 1969 the battalion officially became part of the 23rd Infantry Division (AMERICAL). Location: Duc Pho Service: April 68 - Jan. 69 Major Command: 11th Infantry Brigade Location: Duc Pho Service: Feb. 69 - March 71 Major Command: 23rd Infantry Division (AMERICAL) Location: Duc Pho/Dong Ha Service: April 71 Major Command: 23rd Infantry Division (AMERICAL) Location: Duc Pho Service: May 71 - June 71 Major Command: 23rd Infantry Division (AMERICAL) 4th Battalion, 23rd Infantry
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