This is the eighth of some hundred contemplated volumes covering the Army's part in World War II. This particular volume is written from the viewpoint of the Staff of the Army's high command. The Operations Division of the General Staff was the general headquarters within the General Staff with which General Marshall exercised his over-all Army command. Its history presents problems which are likely to arise in future wars. These problems may not all be solved by an Army staff in the future in view of current unification, but what they were and how they were solved is of interest not only to the soldier, but to the diplomat and statesman as well as others. Dr. Ray S. Cline was a Junior Fellow at Harvard and served in the Office of Strategic Services. In 1946 he was assigned to the Operations Division of the War Department General Staff to write its history. The result shows a great amount of effective research and understanding from within that Division. Its viewpoint is from within and emphasizes the action taken by the Division in carrying out the policies of the high command.