Overview: At times, warfare comes down to a duel between two great commanders. In the St. Mihiel and Meuse-Argonne offensives the first full-scale American actions on World War I s Western Front two brilliant military leaders faced off in what would become an epic struggle.At times, warfare comes down to a duel between two great commanders. In the St. Mihiel and Meuse-Argonne offensives the first full-scale American actions on World War I s Western Front two brilliant military leaders faced off in what would become an epic struggle.