Meuse-Argonne Offensive As part of the final Allied offensive on the Western Front the American Expeditionary Force (AEF) had been charged in September of 1918 with launching an assault against the sector of the front held by the German Fifth Army (Georg von der Marwitz) between the Argonne Forest and the River Meuse, and to advance in the general direction of Mézières. Heading the AEF was General John Pershing, who also took command of the newly formed United States First Army. After completing t…