Although the Meuse-Argonne Offensive, which began in late September 1918 and continued through to the Armistice, was not the first major action fought by the AEF, it was the greatest in which it engaged in the Great War.The Argonne was an area that had been heavily fought over, particularly in the early part of the war; its eastern part, towards the Meuse, then became enveloped in the first great attritional battle of the war, Verdun.