Feudalism was well established in Europe by the 800s CE but appeared in Japan only in the 1100s as the Heian period drew to a close and the Kamakura Shogunate rose to power.
European feudalism died out with the growth of stronger political states in the 16th century, but Japanese feudalism held on until the Meiji Restoration of 1868.
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The four river valley civilizations were the Tigris & Euphrates Valleys, the Nile River Valley, the Indus River Valley, and the Yellow River Valley. Civilizations developed around rivers because their waters provided places to hunt and fish. Also, as the rivers flooded, the lands around them became fertile.
Answer:
They had differing ideas about a powerful national government
the answer is B by the way, good luck!
Japan invaded "China" in 1937, due mostly to the fact that Japan and China had actually been engaged in conflict for quite some time, and Japan was trying to acquire more resources.