From the publisher's website: The cavalier: A mounted knight whose power comes as much from the conviction of his ideals, the oaths that he swears, and the challenges that he makes as it does from sheer force of arms. Introduced in the Pathfinder Advanced Player’s Guide, the cavalier is perhaps gaming’s closest representation of the mounted knight of the high middle ages - the classic image of the crusader, feudal lord, or champion of the joust. Advanced Options: Cavaliers’ Orders presents six new orders for cavaliers to be part of, doubling the number of orders available to cavaliers from the Pathfinder Advanced Player’s Guide.