This study owes its existence to a book, The Blitzkrieg Era and the German General Staff, 1865-1941, by Larry H. Addington, which first excited my interest in logistics. Professor Addington has also kindly answered some queries, as did Mr David Chandler and Mr Christopher Duffy, both of the Department of Military History, Sandhurst. I owe a debt of gratitude to Professor Laurence Martin and Mr Brian Bond, of King's College, London, for aid and encouragement. Material for Chapter 7 was made available on behalf of the Liddell Hart Centre for Military Archives by Lady Kathleen Liddell Hart, for whose kind hospitality I am most grateful. Some financial support during my stay in London came from the British Council. Above all, however, I thank Rachel my wife; it was she who typed out some of the chapters, and suffered for the rest.