Joshua heroically sweeps through several more cities, killing every single person inside (including the children) before he has a new idea; he decides to be even more cruel and starts slashing the hamstrings of the horses of the people he killed. Why did he do this? What possible reason could there be to fuck up a horse AFTER you've already killed the person it belongs to? Well, God told him to (or so he says.) 
Joshua eventually gets old and dies, but not before he personally murdered 31 different kings of the region and taken their land.