"During the three hours preceding H hour, the Allies expended more ammunition than both sides managed to fire throughout the four years of the . The cost was later calculated to have been $180 million, or $1 million per minute." The American attack began at 05:30 on September 26 with mixed results. The V and III Corps met most of their objectives, but the 79th Division failed to capture Montfaucon, the 28th "Keystone" Division's attack virtually ground to a halt due to formidable German resistance, and the 91st "Wild West" Division was compelled to evacuate the village of Épinonville though it advanced . The inexperienced 37th "Buckeye" Division failed to capture Montfaucon d'Argonne.