Western Europe, the Byzantine (Eastern Roman) Empire, and the States of Eastern Europe from CE 395 to c. 1050
The Emmpire of the Caliphate and Its Successor States to c. CE 1055
Western Christendom in the High and Later Middle Ages (c.1050-c.1500)
The Crusading Movement, the Islamic States of Southwest Asia, North AFrica, and Europe, and the States of Eastern Christendom from c. 1050 to c. 1480