This book is not intended as a definitive history of this phase of the American effort in Europe, but to record the highlights of that great project. Obviously no one person could gather and evaluate all the material for a book on the Services of Supply of the United States Army in the European Theater of Operations. Actually more than one hundred persons, ranging from a private first class to the Supreme Commander of the Allied Expeditionary Forces, contributed variously. Ten general officers, for instance, read proof and criticized chapters dealing with their particular branches. The material as a whole, however, was gathered through the Historical Section of ETO and by the historians of the staff sections. The idea of the book originated with Colonel William A. Ganoe, the original Theater Historian.