He knew that the majority of the Union forces were in full retreat and that he likely would have no support. However, he understood the terrain and how to utilize the strongpoint defense. So despite being outnumbered and unsupported, General Thomas accepted the risk and chose to fight along the ridges. Furthermore, Thomas, aware of his lack of supplies, rather than withdraw too early, ordered bayonet charges when his army had run low on ammunition. Although a very dangerous maneuver, which involves advancing from the protection of the defenses and charging towards the enemy, retreating from the ground would prove to be a more devastating alternative. Major General Thomas could either retreat or attack and he chose to attack. His forces faced the enemy with bayonets multiple times, allowing his defense to hold fast against the heavy assaults of Longstreet before receiving new supplies from the fortuitous and unexpected arrival of Granger’s reserve