Second Battle of the Marne — Germany's Last Offensive

Germany launched its final offensive of the war across the Marne River, but Allied forces—forewarned by captured prisoners—had withdrawn their forward positions and the German artillery bombardment fell on empty trenches. Allied counterattacks using tanks, aircraft, and American divisions drove Germany back. The battle marked the definitive end of German offensive capacity and the beginning of the Allied counteroffensive that would win the war.