Each game in the HISTORICAL SERIES contains a trio of strategic simulations utilizing the same system which feature: Plastic pieces and metal markers Three separate laminated mapsheets Only eight pages of standard rules Hidden force attributes, and A unique correlation of leadership, morale, troop quality, and strength ratings. Emphasis is on playability, quality components, and accurate options.BY FORCE OF ARMS contains the campaigns of Alexander the Great, the Reconquista (Spain versus the Moors), and The Hordes of Genghis Khan. - BoardGameGeek