On September 19, 1863, Braxton Bragg’s Army from Tennessee defeated a Union force commanded by General William Rosecrans in the Battle of Chickamauga. After Rosecrans’ troops had pushed the Confederates out of Chattanooga early that month, Bragg called for reinforcements launching a counterattack on the banks of nearby Chickamauga Creek. The fighting began on the morning of September 19. Bragg's men strongly assaulted but could not break the Union line. The next day, Bragg continued his assault. In late morning, Rosecrans was misinformed that he had a gap in his line. By moving units to shore up the supposed gap, Rosecrans accidentally created an actual gap, directly in the path of an eight-brigade assault on a narrow front by Confederate Lt.
