The purpose of this thesis was to determine the adequacy of current U. S. Army doctrine relative to encircled units and breakout operations in view of the problems encountered by the 31st Regimental Combat Team, U. S. 7th Infantry Division, on the eastern side of the Changjin Chosin] Reservoir in North Korea from 26 November to 2 December 1950. Tactical doctrine was defined as authoritative guidance published by Headquarters, Department of the Army, pertaining to the employment of U. S. Army units in combat. The historical and descriptive method,\" of research were used to ascertain the background, training and preparation of the 7th Infantry Division prior to entry into combat in Korea; combat experience of the 7th Infantry Division prior to deployment of the 31st Regimental Combat Team to the Changjin Reservoir; and finally, the period of 26 November to 2 December 1950 during which the 31st Regimental Combat Team was encircled by an estimated two Chinese Communist Divisions and attempted breakout operations which ended in the force ceasing to exist as a military unit. | Case Study Of United States Army Tactics And Doctrine For Encircled Forces by Robert M Coombs, Paperback | Indigo Chapters