This monograph describes the planning and execution of airborne operations by the Army Air Forces in the European Theater during World War II. Intended to serve as a case history of large-scale airborne operations, it seeks to analyze and evaluate them as a basis for doctrine and for the benefit of future planners. Chapters are as follows: (1) The Airborne Invasion of Normandy - Plans and Preparations, including the COSSAC Phase, deployment and training, final preparations, and deception and diversion; (2) The Assault, including various paratroop and glider missions; (3) From Neptune to Market, which focuses on organizational changes, plans and campaigns during the Campaign in France, the planning of Operation Market, and preliminary support operations; (4) Market - The Airborne Invasion of Holland, which includes descriptions of operations in various sections of Holland; (5) Varsity - The Airborne Assault Across the Rhine, including planning, training, security measures, auxiliary air operations, and lift and initial operations of the British Airborne Division, American Paratroops, and American Glider Troops; and (6) Conclusions Regarding Large-Scale Airborne Operations.