On the Confederate side, Lee received some intelligence reports that made him believe Grant was planning to withdraw toward Fredericksburg. If this came to pass, he wanted to follow up with an immediate attack. Concerned about the mobility of his artillery to support the potential attack, he ordered that the guns be withdrawn from Allegheny Johnson's division in the Mule Shoe to be ready for a movement to the right. He was completely unaware, of course, that this was exactly the place Grant intended to attack.