Answer: From the earliest legends, there were different peoples in the north and south of the peninsula. The Chosen and Koguryo kingdoms were based in the north, while rival kingdoms fought for control of the south. Under the Koryo Dynasty, the Mongols and Japanese, there were some unification of the peninsula. Also, Buddhism influenced both the north and the south. However, after World War II, the peninsula became split once again, as a result of tensions between the United States and the Soviet union. Today, the Peoples of North Korea and South Korea are working to unite their country under modern governance.
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