Despite their unexpected naval success, the Confederate generals were still skeptical about their chances in the fort and held another late-night council of war, where they decided to retry their aborted escape plan. At dawn on February 15, the Confederates launched an assault led by Pillow against McClernand's division on the unprotected right flank of the Union line. The Union troops, unable to sleep in the cold weather, were not caught entirely by surprise, but Grant was. Not expecting a land assault from the Confederates, he was up before dawn and had headed off to visit Flag Officer Foote on his flagship downriver. Grant left orders that none of his generals was to initiate an engagement and no one was designated as second-in-command during his absence.