Rosecrans had an elaborate plan. While Bragg's attention was focused on what he expected to be the main attack on his strongly defended poison at Shelbyville, Rosecrans would attack Bragg's right flank at Hoover's and Liberty Gaps, which were defended by Lieut. Gen. William J. Hardee's Corps.
Leading the Union cavalry on a demonstration toward Shelbyville, Maj. Gen. David S. Stanley advanced a strong force from Triune down the Lewisburg Pike. His troops were first to encounter Confederate resistance. Outside of Eagleville the Federals ran up against units from Wheeler's cavalry. In the fighting, the Confederates fell back from hill to hill, making the Federal advance difficult. The fight eventually reached the village of Rover, where Union troops took the abandoned Rebel post. The Federal force then pushed on near to Unionville, where it ran up against the main line of the infantry corps of Gen. Leonidas Polk.
|Source: Civil War Maps by Hal Jesperson|
Sources: Tullahoma: The Campaign for the Control of Middle Tennessee, Michael R. Bradley; The Army of Tennessee, Stanley F. Horn