The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and the Battle of the Argonne Forest, was a major part of the final Allied offensive of World War I that stretched along the entire Western Front. It was fought from September 26, 1918, until the Armistice of 11 November 1918, a total of 47 days. The Meuse-Argonne Offensive was the largest in United States military history, involving 1.2 million American soldiers, and was one of a series of Allied attacks known as the Hundred Days Offensive, which brought the war to an end. The battle also cost General Pershing, the American commander, 26,277 killed and 95,786 wounded, making it the largest and bloodiest operation of the war for the American Expeditionary Forces. American losses were exacerbated by the inexperience of many of the troops and tactics used during the early phases of the operation.