During the period of the Crusades, turcopoles were locally recruited mounted archers and light cavalry employed by the Byzantine Empire and the Crusader states. A leader of these auxiliaries was designated as Turcopolier, a title subsequently given to a senior officer in the Knights Templars and the Order of the Hospital of St John of Jerusalem, in charge of the coastal defences of Rhodes and Malta. In addition to the two Military Orders, the army of the Kingdom of Jerusalem employed king's Turcoples under the direction of a Grand Turcopolier.