Help, Defend Heal is a supplement to Right Cruel and Fell which adds troop types, new actions, and special rules to extend the timeframe and geographic location of the basic rules. This supplement covers the Teutonic Knights and other military-religious orders and their eastern opponents, such as the Balts, Russians, Lithuanians and Poles (but not the Mongols). Like RC&F, HDH contains orders of battle, both historical and hypothetical. In addition to the topical terrain generation rules, there is an accurate map of the large Grunwald battlefield. The basic rules set of RC&F is necessary to play this supplement. —description from the publisher