The history of the Grand Duchy of Luxembourg between 1918 and 1923 is not fundamentally unknown. Many historians have worked on the "Luxembourg question from 1918 to 1919", or the post-war dynastic question, or the social movements emanating from this period. Three major countries are thus the protagonists of the events of this period: to begin with Luxembourg’s government and even its population. Belgium through an annexationist policy, also influenced greatly the Grand Duchy. And last but not least France. The latter's policy, which is often considered as being annexationist, cancels that of Belgium. French troops were present in Luxembourg between 1918 and 1923 on its territory. Then of a garrison. This element had never been previously studied as such, but it is the proof of the physical presence of France and of the incarnation of its political will throughout the period. The study of occupation and then of the French garrison in Luxembourg allows updating the ambiguity of the French policy but also the influence of this presence on Luxembourg’s politic, and on everyday life as well. as much as on everyday life. Finally, in order to analyze the memory consequences, of which historiography is embodied, this study is to be seen through the prism of the garrison. It thus allows us to glimpse the major role of France during this period, both in terms of multiple events (political, economic, social and diplomatic), but also it’s long-term role. ; L’histoire du grand-duché de Luxembourg entre 1918 et 1923 n’est pas fondamentalement inconnue. De nombreux historiens ont travaillé sur la « question luxembourgeoise de 1918 à 1919 », sur la question dynastique d’après-guerre, ou encore sur les mouvements sociaux émanant de cette époque. Trois acteurs majeurs sont ainsi les protagonistes des événements de cette période : le Luxembourg, que ce soit le Gouvernement ou encore la population elle-même. La Belgique, qui à travers une politique annexionniste influence grandement le Grand-Duché. La France est le troisième. La ...