At 4:30 in the afternoon, the 75th's commander, Col. Robert Reily, had heard reports of a Confederate movement in his direction. Unlike many other commanders, including General Howard, Reily did not dismiss them. He prepared the 75th Ohio for an attack he knew was coming. He had his men lie down and rest by their guns and wait for the attack. Within a half-hour, Jackson's Corps rushed out of the thick underbrush. When Jackson's corps struck at about 5 p.m., the XI Corps was completely unprepared, many of the men engaged in eating supper. Most of the XI Corps was taken by surprise and broke for the rear without firing a shot. As other men of the XI Corps ran by in a panic, the 75th Ohio stood and fired back at the Confederates. They kept up the fire for ten minutes until the Confederates had overwhelmed their lines forcing them to retreat. In those ten minutes, Colonel Reily was killed, while 150 other men of the 75th Ohio were killed or wounded.