Risden (April 1959 - March 1960) Colonel Charles L. Heltman Jr. (March 1960 - May 1960) - acting Brig. Gen. Ashton H. Manhart (May 1960 - February 1962) - Division inactivated Vietnam War The 9th Division was reactivated on 1 February 1966, and arrived in South Vietnam on 16 December 1966 from Fort Riley, Kansas. On deployment the division was assigned to the III Corps Tactical Zone of Vietnam where it commenced operations in Dinh Tuong and Long An Provinces (6 January-31 May 1967) in Operation Palm Beach. Its area of operations was in the rivers and canals of the Mekong Delta from 1967 to 1972. Operating deep within the Viet Cong (VC)–controlled Delta, the Division was charged with protecting the area and its population against VC insurgents and ensuring the success of the South Vietnamese government's pacification program. Faced with unrelenting physical hardships, a tenacious enemy and the region's rugged terrain, the Division established strategies and quantifiable goals for completing their mission. Division commanding generals were: Maj. Gen. George S. Eckhardt (February 1966 - June 1967), Maj. Gen. George G. O'Connor (June 1967 - February 1968), Maj. Gen. Julian Ewell (February 1968 - April 1969), Maj. Gen. Harris W. Hollis (April 1969 - August 1969) The infantry units that served with the 9th Infantry Division were: 2d Battalion, 39th Infantry 3d Battalion, 39th Infantry 4th Battalion, 39th Infantry 2d Battalion, 47th Infantry (Mechanized) 3d Battalion, 47th Infantry (Riverine) 4th Battalion, 47th Infantry (Riverine) 2d Battalion, 60th Infantry 3d Battalion, 60th Infantry (Riverine) 5th Battalion, 60th Infantry (Mechanized Dec. 1966 – 12 September 1968; Infantry 13 September 1968 – October 1970) 6th Battalion, 31st Infantry Other units included: Company E, 50th Infantry (reflagged Co. E, 75th Inf (Ranger)), 2 December 1967 – Aug 1969 Company E, 75th Infantry, Oct 1969 – Oct 1970 3d Squadron, 5th Cavalry, Feb 1967 – Nov 1971 9th Aviation Battalion, Jan 1967 – Aug 1969 2d Battalion, 4th Artillery (105mm Howitzer), Jan 1967 – Oct 1970 1st Battalion, 11th Artillery (105mm Howitzer), Jan 1967 – Aug 1969 3d Battalion, 34th Artillery (105mm Howitzer)(Riverine), Dec 1966 – Jul 1969 (Riverine) 1st Battalion, 84th Artillery (155mm Howitzer/8-inch Howitzer), Feb 1967 – Aug 1969 15th Engineer Battalion, Oct 1966 – Aug 1969 571st Engineer Company, Oct 1969 – Oct 1970 9th Medical Battalion, 4 January 1967 – 18 August 1969 9th Signal Battalion, 19 December 1966 – 19