A themed microfiche collection relating to material produced by the Historical Detachments of the US Army during the Korean War, 1950-1953. The scope and content of the interviews and studies therein was influenced by the nature of the conflict and by the types of units employed in combat. Despite the involvement of United Nations forces and the US Marine Corps, all units interviewed by the Historical Detachments were from the US Army. The two primary components of this collection are 'After-Action Reports' and 'Studies'. 'After-Action Reports' include accounts of combat-related activities of specific units during a campaign, engagement, or operation. They focus on the role or scope of action of particular units for a given period of time at a specific location, and consist of a narrative account of the action, combat interviews, and supplementary materials, including manuscript and printed maps, charts, and photographs. 'Studies' were prepared by the Historical Detachments to provide insight into unit strengths or deficiencies or problems in fundamental strategic and tactical matters, including the use of new weapons, techniques for supply and support, and fighting behaviour. 'After- Action Reports' in this collection include material relating to the assault on the North Korean defence line north of the Hongchon River by US 5 Cavalry Regt, 13-20 Mar 1951; Operation TOMAHAWK, the airdrop of US 187 Airborne Regimental Combat Team behind enemy lines at Munsan-ni, Korea, and the subsequent fighting around Parun-ni, Korea, 22 Mar-29 Mar 1951; preparation of defensive positions consisting of booby traps, barbed wire, and mines in the General Defense Line, Korea, 17-18 May 1951; action of US 3 Infantry Div to control the high ground of the 'Iron Triangle', which encompassed Chorwon, Kumwa, and Pyongyang, Korea, Jun 1951; engagements by US 23 Infantry Regt to control and secure strategic 'Heartbreak Ridge', the area connecting Hill 931 and Hill 894 near Satae-ri and Mundung-ni, Korea, Sep-Oct 1951; Operation CLAM UP, the operation to deceive the North Korean People's Army into dispatching patrols against United Nations lines, exposing them to ambush and capture, Feb 1952; Operation SMACK, US 31 Infantry Regt assault on Pokkae and Hasakkol, Korea, with co-ordinated support from air, artillery, and tank units, 12 Jan-25 Jan 1953. 'Studies' in this collection include reports relating to US personnel management from the beginning of hostilities until the initiation of cease-fire negotiations, Jun 1950-Jul 1951; inter-Allied co-operation during combat operations, Jun 1950-Jul 1951; offshore procurement of supplies by US 8 Army, 26 Jun 1951-31 Jul 1953; efforts to evacuate American and Allied dead from cemeteries in Korea and the Glory Plan to recover bodies from North Korea, 26 Jun 1950-23 Dec 1953; the organisation, activities, and equipment of mobile army surgical hospitals, auxiliary surgical and neurosurgical teams, and other US 8 Army medical support facilities, Jul 1950-Feb 1953; the Korean War armistice negotiations, Jul 1951-Jul 1953; ordnance salvage operations, Jul 1951-Sep 1953; logistical support to prisoners of war detained by United Nations forces, Jul 1951-Jul 1953; the organisation and pattern of North Korean People's Army and Chinese People's Liberation Army tactics, 26 Dec 1951; Chinese People's Liberation Army and North Korean People's Army materiel, weapons and equipment, 19 Jun 1952; US Army tank employment in positional warfare, 10-30 Jan 1953.