Following the fall of Roman Anatolia to the Muslim Turks, the Byzantines put out a call to the Pope in Rome for assistance in the 11th century. The result was a series of wars known as the Crusades launched by the Franks from Western Europe to reclaim the former Byzantine Christian territories in the Eastern Mediterranean, especially Syria and Palestine (the ''Levant''). The First Crusade succeeded in temporarily establishing the Kingdom of Jerusalem and the County of Tripoli as Roman Catholic Christian states along the coast. These crusader states made a lasting impact on the region, though their control was limited, and the region returned to full Muslim control after two centuries following the conquest by the Mamluks.