What does victory on the battlefield look like? Can you fail your objective but still change the war? The U.S. Marines at Soissons did just that. Failed by their planners, these Marines drove headfirst into a maelstrom of German firepower. The casualties were horrific, but their determination to hold the ground they gained changed the calculus of the Western Front. And that's why Soissons is a battle you might not know, but should.