With Confederate forces operating in Maryland and Kentucky, the third prong of the overall Confederate offensive begins moving in Mississippi.
Sterling Price’s Confederates move against Iuka in northern Mississippi to threaten the flank of William S. Rosecrans’s army based at Corinth.
Braxton Bragg’s Confederate army arrives at Chattanooga, while the Federal high command scrambles to learn Bragg’s intentions.
As Henry W. Halleck prepares to go to Washington to become general-in-chief, he reorganizes the armies within his Department of the Mississippi.
William S. Rosecrans’s Federals clash with John B. Floyd’s Confederates as Rosecrans tries to strengthen his foothold in western Virginia.
John B. Floyd advances unopposed in western Virginia and clashes with a Federal regiment separated from the main force.