The Confederate plan was for Pillow to push McClernand away and take control of Wynn's Ferry and Forge Roads, the main routes to Nashville. Buckner was to move his division across Wynn's Ferry Road and act as rear guard for the remainder of the army as it withdrew from Fort Donelson and moved east. A lone regiment from Buckner's division—the 30th Tennessee—was designated to stay in the trenches and prevent a Federal pursuit. The attack started well, and after two hours of heavy fighting, Pillow's men pushed McClernand's line back and opened the escape route. It was in this attack that Union troops in the West first heard the famous, unnerving rebel yell.