A year from 2333B.C. to 1400 AD The civilization of Korea started around 6000 BC in the Neolithic are. But Korean history really started from 2333 BC. At that time, Korea had four countries. The four countries, are Ko-Gu-Ryo, Pack-Che, Shilla and Ka-Ya, Ka-Ya incorporated with Ko-Gu-Ryo in 200 B.C. because this country couldn't handle the War between the other countries. At first, one of these three countries, Ko-Gu-Ryo, was strongest and biggest. This country developed toughness and sprightliness by having many years of War with China. The Chinese people were afraid Ko-Gu-Ryo after they had many years of war so that they built the great wall of China for defense. Ko-Gu-Ryo spent