On August 16, 1863, Maj. Gen. William S. Rosecrans, commander of the Army of the Cumberland, launched a campaign to take Chattanooga, Tennessee. Col. John T. Wilder's brigade of the Union 4th Division, XIV Army Corps, marched to a location northeast of Chattanooga where the Confederates could see them, reinforcing Gen. Braxton Bragg's expectations of a Union attack on the town from that direction.