Two Union assaults on Confederate artillery failed to capture or disable the guns. The Union line held, but the soldiers were pinned down under a deadly barrage of shot and shell as Confederate cannon on the ridge behind fired rapidly and accurately. Amid the noise, smoke, shouted orders, curses, and the cries of the wounded and dying, hundreds of Confederate soldiers moved undetected through a shallow ravine. Colonel Alfred A. Russell's 4th Alabama and Colonel Thomas Woodward's Kentucky Battalion slipped around the end of the Union line and emerged behind Union soldiers who were focused on the threat to their front, throwing them into considerable confusion.