The military thought today is based rightly on the experiences of the past and reflections of the great military leaders. Many people in Europe and overseas, and have "rediscovered" the effectiveness of the modes of action designed at the time by Gallieni and Lyautey. These two great "Colonial" stress at the turn of the nineteenth and twentieth centuries the overriding obligation to rally people, parallel to the conduct of military operations specifically. In the present context, it seems useful to return to the sources of this teaching. That's what this book offers by studying the conditions under which, Gallieni Madagascar between 1897 and 1905 and Lyautey in Morocco 1912, 1925, and applies them have imagined "doctrine of peace." The concepts of "oil stain" mobile groups whose work relies on a network of stations, self-defense populations, nesting civil and military action advocated today, find their origin. Reading this book will help the reader to see the continuity and relevance of responses developed by these two great Marshals of France, Lyautey and Gallieni