Forty-Seven Days: How Pershing's Warriors Came of Age to Defeat the German Army in World War I 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 26,000 deaths and leaving nearly 100,000 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. A book signing follows the program.