Kilij Arslan I
The Battle of Dorylaeum (1097) during the First Crusade shows the advantages and disadvantages of mounted archers; the rider groups of the Seljuk sultan, Kilij Arslan I, were able to surround an army of Crusaders and shoot them from a distance. Suddenly, reinforcements under the command of Godfrey of Bouillon arrived, and the Seljuks themselves were encircled. They could no longer escape and were annihilated in close combat. The defeat of the Seljuks at Dorylaeum was so complete that the Crusaders then crossed Anatolia virtually unchallenged.