Once the nomads arrived in Europe, they made several changes – some purposefully, some accidentally. They had to travel seven thousand kilometers over mountainous terrain and deserts. During the trek, they were spreading fleas infected with the bubonic plague. These insects caused the deaths of thousands in Europe. This plague caused so much devastation; it was called “The Black Death”. A positive change from the Mongols arrival was the beginning of the Pax Mongolica. It was one hundred years of peace among the people under Mongol rule. This peaceful time allowed the Silk Road to re-open, continuing trade between Asia and the Middle East. Also, when the Mongols overthrew the Russians, they united to fight back to regain the throne. This unification restored ties between the clans, giving them the chance to coexist in peace.
The decentralization in Japan and Western Europe was a form of Feudalism. Both places were constantly under attack and the people went to vassal lords or Daimyos for safety and protection. The upper lords offered to protect them in exchange for their land. In return, the people that felt threatened would work on the land that they provided to the lords. These people became farmers. Both of these regions used feudalism for protection, but protection from different things. Japan needed protection from itself, because the clans within were breaking out because the government was weak. Europe needed