B. lord
shoguns<span> were the de facto rulers of the country, though officially they were appointed by the emperor.</span>
C. They made a treaty with China to explore the area
After ten centuries of wars, defeats, and victories, the Byzantine Empire came to an end when Constantinople fell to the Ottoman Turks in May 1453. The city's fall sent shock waves throughout Christendom. It is widely quoted as the event that marked the end of the European Middle Ages.
