The American Army launched its first great attack of the war against the St. Mihiel Salient on the Alsace front. The offensive was supported by an unprecedented 1,476 Allied aircraft used as part of a coordinated air-ground attack. Within 36 hours, the Americans took 15,000 prisoners and captured over 400 pieces of artillery as the Germans withdrew. From intelligence reports and prisoners taken across the front it was becoming clear that the enemy’s mobile reserves had almost completely been absorbed into the front line. German Division after Division was being disbanded and the strength of the enemy’s remaining Divisions was also rapidly diminishing.