Battle of Saint-Mihiel

World War I battle, 12-16 September 1918, in which the American Expeditionary Forces and 110,000 French troops under Pershing attacked German positions at the Saint-Mihiel salient. The first large offensive launched by the US Army, it marked the first American use of D-Day and H-Hour. Pershing hoped to break through to Metz; the Germans, mid-retreat, were overcome more easily than expected.