In A Weird Situation

Riddle: The fight is almost coming to an end after a five minute battle. Team one lost all of the members, except for leader Joe who carries a big hammer, which is very dangerous and strong. Team two had two remaining people with no leader but one person who uses a bat and one person that uses an axe. Team two tried cornering Leader Joe, who then surrendered. Despite the fact that leader Joe had a bigger and much more dangerous weapon than the two on the other team, why did he surrender?