The Battle of the Meuse-Argonne is the deadliest clash in American history: more than a million untested American soldiers went up against a better-trained and experienced German army, resulting in more than twenty-six thousand deaths and leaving nearly a hundred thousand wounded. Yet in forty-seven days of intense combat, these Americans forced the Germans to surrender, bringing the First World War to an end. Historian Mitchell Yockelson tells how General John J. “Black Jack” Pershing’s exemplary leadership led to the unlikeliest of victories.