The St. Mihiel salient, created during the initial German invasion in 1914, had withstood multiple French efforts to regain the territory. Yet even though the Germans had established strong defensive positions around St. Mihiel and its neighboring villages and towns, the salient was highly vulnerable to attack and was an optimal target for a potential American operation. Until this point in the war, members of the American Expeditionary Forces had not fought in a formation larger than a corps, and then only under French or British leadership. Now, as part of the American First Army under General John J. Pershing, they prepared to launch an offensive that would demonstrate to the Allies and the Germans alike that the Americans were capable of operating as an independent command. The AEF's successful efforts in the St. Mihiel Offensive, and the hard-won operational and tactical lessons that it learned during the battle, helped set the stage for the grand Allied offensive that would seize the initiative on the Western Front and blaze a path toward ultimate victory in the war.