The Three Kingdoms Period
After obtaining their independence from China in A.D. 220, the Koreans eventually formed themselves into three separate kingdoms. These kingdoms were known as Silla, Paekche, and Koguryo. From A.D. 313 until A.D. 668 these three kingdoms would rule the Korean Peninsula. Then in A.D. 668 the Kingdom of Silla conquered the other two kingdoms, uniting all of Korea under a single government.