The Meuse-Argonne Offensive was a major military campaign during World War I, taking place from September 26 to November 11, 1918. It was part of the larger Allied effort to push back the German forces on the Western Front. The offensive involved over a million American troops, making it one of the largest operations in U.S. military history. The campaign aimed to break through the Hindenburg Line and secure vital supply routes. It resulted in significant territorial gains for the Allies and contributed to the eventual armistice that ended the war. The Meuse-Argonne Offensive is remembered for its high casualties and strategic importance.