Once an initial breakthrough was made by the leading element, the following lines would widen the breach and spread out on each side. Gershom Mott's division was designated to support the breakthrough as well. Mott's division (4th Division, II Corps) was the weakest in the army. Once Joe Hooker's command, it had been transferred from the defunct III Corps two months earlier. The morale of the enlisted men suffered from this, and several of its regiments' enlistment terms were about to expire in a few weeks, making the men extremely gun-shy. They had been badly shot up and routed in the Wilderness, and as they headed towards the Confederate entrenchments, a burst of artillery fire caused the men to panic and flee from the field, never getting closer than a quarter of a mile to the enemy position.