From publisher blurb: Rule Supplement 1: Mounted Combat is the most complete and authoritative resource for mounts and mounted combat in the D20 System. It includes rules for: Flying mounts Burrowing mounts Climbing mounts Swimming mounts Large and small mounts Intelligent mounts Multiple riders Riding platforms Cavalry maneuvers Warpacks Contest Jousting And more! Inside you’ll also find new equipment, dozens of new skill uses, expanded descriptions of the Handle Animal and Ride skills, and more than 50 feats, along with all the rules you’ll ever need for riding a mount -- no need to flip back and forth between the core rulebooks!