Answer:
Cultural cross pollination of Eurasia under the Mongols had major influence on everybody involved. The old Mongol capital of qaraqorum was built using the best that the Afro-Eurasian cultural sphere had to offer. Afro-Eurasian cultural sphere because of course not everybody involved in the empire belonged to it.
The first USA president was George Washington.
Late 1950s to the late 1970s
Congress did not allow the United States to join the League of Nations or sign the Treaty of Versailles, so the United States had to sign separate peace treaties.
