Korean History By lazuade Period: 300 to 600 Three Kingdoms Period Period: 668 to 935 Unified Silla Period: 918 to 1392 Goryeo Dynasty Period: 1170 to 1270 Military Rule Period: 1270 to 1356 Mongol Overlord Period Period: 1392 to 1897 Joseon Dynasty 1446 Creation of the Korean Alphabet 1592 1592-1598 Japanese Invasions 1627 1627-1636 Manchu Invasions 1894 Donghak Invasions and Sino-Japanese War 1897 1897-1910 Great Korean Empire 1910 1910-1945 Japanese Colonial Rule 1945 Liberation/Occupation by Allied Forces 1948 Establishment of Separate Koreas 1950 1950-1953 Korean War 1987 Establishment of Democratic Government in South Korea