They used the Federal Republic. :)
1. The Pax Mongolica (1 century of peace w/ neighboring people under mongol rule)
2. Unifaction of Russia
3. The Pax Mongolica reopened of silk road routes from Asia to Europe
Because he and his men went right around the world in tiny, ungainly boats
General George Washington learns that Lt. Cornwallis's army is camped very near Yorktown, Virginia. He then talked to the French and moved near there. The causes were the French-American siege, the support of the French Navy, and other advantages the French and Americans got from each other