John Wesley on Joshua 11:6

Hough their horses - Cut their hamstrings that they may my be unfit for war. For God forbad them to keep many horses, now especially, that they might not trust to their horses, nor ascribe the conquest of the land to their own strength, but wholly to God, by whose power alone a company of raw and unexperienced footmen were able to subdue so potent a people, who besides their great numbers, and giants, and walled cities, had the advantage of many thousands of horses and chariots.