Bragg was appalled at the condition of Polk's battle line, which contained gaps and was not properly anchored on the flanks. As he rode in, he observed some of McCook's I Corps troops north of town, but he assumed that the primary threat continued to be on the Springfield Pike, where the action against the III Corps had taken place early that morning. (He had no knowledge of Crittenden's II Corps approaching on the Lebanon Pike.) He gave orders to realign his army into a north–south line and prepare to attack "en echelon". Cheatham's division marched north from town and prepared to open the attack on the Union left—which Bragg assumed to be on the Mackville Road—beginning a large "left wheel" movement. Two brigades from Patton Anderson's division would then strike the Union center and Buckner's division would follow up on the left. Another of Anderson's brigades, commanded by Col. Samuel Powel, would attack farther to the south along the Springfield Pike. The large clouds of dust raised by Cheatham's division marching north at the double-quick prompted some of McCook's men to believe the Confederates were starting to retreat, which increased the surprise of the Rebel attack later in the day.