Includes over 50 photos and 22 maps THIS IS THE FOURTH in a series of five volumes dealing with the operations of United States Marines in Korea during the period 2 August 1950 to 27 July 1953. Volume IV presents in detail the operations of the 1st Marine Division and 1st Marine Aircraft Wing, the former while operating under Eighth Army control and also as part of IX Corps and X Corps, USA, and the latter while controlled by the Fifth Air Force. The period covered in this volume begins in the latter part of December 1950, when the Division rested in the Masan “bean patch,” and continues through the guerrilla hunt, the Punchbowl fighting, and all other operations during 1951. The account ends...March 1952. “AMERICANS everywhere will remember the inspiring conduct of Marines during Korean operations in 1950. As the fire brigade of the Pusan Perimeter, the assault troops at Inchon, and the heroic fighters of the Chosin Reservoir campaign, they established a record in keeping with the highest traditions of their Corps. No less praiseworthy were the Marine actions during the protracted land battles of 1951, the second year of the Korean “police action.” The 1st Marine Division, supported wherever possible by the 1st Marine Aircraft Wing, helped stem the flood of the Chinese offensive in April. Then lashing back in vigorous and successful counterattack, the Marines fought around the Hwachon Reservoir to the mighty fastness of the Punchbowl... The year of desperate fighting, uneasy truce, and renewed combat covered by this volume saw the operational employment of a Marine-developed technique—assault by helicopter-borne troops. Tactics were continually being refined to meet the ever changing battle situation. However, throughout the period, the one constant factor on which United Nations commanders could rely was the spirit and professional attitude of Marines, both regular and reserve. This is their hallmark as fighting men.”- Gen. Shoup