July 30

Second Battle of the Marne — Germany's Last Offensive Fails

Germany's last major offensive of WWI collapsed as French forces, forewarned by captured German soldiers, had pulled back from the front lines before the bombardment. French and American counterattacks then struck the exposed German flanks.

The Second Marne marked the end of German offensive power in WWI; the Allies then launched the Hundred Days Offensive that broke Germany's army and ended the war.