Baron's War

From Clash of Arms:

The system for Barons' War provides a simulation of 13th century warfare by focusing on the essential factors of that period's combat.

Barons' War covers the two major battles of Simon de Montefort - Lewes and Evesham, providing a new take on a rarely covered period of English history. These battles take place in a unique period of English military history when the long bow had not gained its predominance on the English battlefield and cavalry was still the most lethal weapon in the medieval English arsenal.