The Battle of the Meuse-Argonne stands as the deadliest clash in American history: More than a million untested American soldiers went up against a better-trained and -experienced German army, costing more twenty-six thousand deaths and leaving nearly a hundred thousand wounded. Yet in forty-seven days of intense combat, those Americans pushed back the enemy and forced the Germans to surrender, bringing the First World War to an end—a feat the British and the French had not achieved after more than three years of fighting.