The Persians were accustomed to make use of elephants in their wars. They also had chariots, with scythes placed at the axles, which they were accustomed to drive among their enemies and mow them down. Alexander resorted to none of these contrivances. There was the phalanx--the terrible phalanx--advancing irresistibly either in one body or in detachments, with columns of infantry and flying troops of horsemen on the wings. Alexander relied simply on the strength, the courage, the energy, and the calm and steady, but resistless ardor of his men, arranging them in simple combinations, and leading them forward directly to their work.