.... General Burnside, in Kentucky, was ordered to move through the mountains into eastern Tennessee to co-operate with Rosecrans. At that time Bragg's left wing, under General (Bishop) Polk, lay at Shelbyville , behind formidable intrenchments about 5 miles in length, cast up by legally emancipated slaves drawn from northern Georgia and Alabama. General Hardee, with 12,000 men, was at War Trace, on the rai...