page_title: History of Asia
section_title: Three Kingdoms of Korea
hierarchical_section_title: History of Asia / Medieval / East Asia / Three Kingdoms of Korea
caption_attribution_description: English: The map of history of Korea in 476, the moment of greatest territorial expansion of Goguryeo. 한국어: 한국사 지도 - 476년, 고구려 전성기때의 지도.
context_page_description: The history of Asia can be seen as the collective history of several distinct peripheral coastal regions such as East Asia, South Asia, Southeast Asia and the Middle East linked by the interior mass of the Eurasian steppe.
  The coastal periphery was the home to some of the world's earliest known civilizations and religions, with each of the three regions developing early civilizations around fertile river valleys. These valleys were fertile because the soil there was rich and could bear many root crops. The civilizations in Mesopotamia, India, and China shared many similarities and likely exchanged technologies and ideas such as mathematics and the wheel. Other notions such as that of writing likely developed individually in each area. Cities, states and then empires developed in these lowlands.
  The steppe region had long been inhabited by mounted nomads, and from the central steppes they could reach all areas of the Asian continent. The northern part of the continent, covering much of Siberia was also inaccessible to the steppe nomads due to the dense forests and the tundra. These areas in Siberia were very sparsely populated.
context_section_description: The three Kingdoms of Korea involves Goguryeo in north, Baekje in southwest, and Silla in southeast Korean peninsula. These three kingdoms were like a bridge of cultures between China and Japan. Thanks to them, Japan was able to accept Chinese splendid cultures. Prince Shōtoku of Japan had been taught by two teachers. One was from Baekje, the other was from Goguryeo. Once Japan invaded Silla, Goguryeo helped Silla to defeat Japan. Baekje met the earliest heyday of them. Its heyday was the 5th century AD. Its capital was Seoul. During its heyday, the kingdom made colonies overseas. Liaodong, China and Kyushu, Japan were the colonies of Baekje during its short heyday. Goguryeo was the strongest kingdom of all. They sometimes called themselves  as an Empire. Its heyday was 6th century. King Gwanggaeto widened its territory  to north. So Goguryeo dominated from Korean peninsula to Manchuria. And his son, King Jangsu widened its territory to south. He occupied Seoul, and moved its capital to Pyeongyang. Goguryeo almost occupied three quarters of South Korean peninsula thanks to king Jangsu who widened the kingdom's territory to south. Silla met the latest heyday. King Jinheung went north and occupiedSeoul. But it was short. Baekje became stronger and attacked Silla. Baekje occupied more than 40 cities of Silla. So Silla could hardly survive.
  China's Sui dynasty invaded Goguryeo and Goguryeo–Sui War occurs between Korea and China. Goguryeo won against China and Sui dynasty fell. After then, Tang dynasty reinvaded Goguryeo and helped Silla to unify the peninsula. Because Silla was the weakest of all, so it asked Tang for help. Goguryeo, Baekje, and Japan helped each other against Tang-Silla alliance, but Baekje and Goguryeo fell. Unfortunately, Tang dynasty betrayed Silla in order to occupy the whole Korean peninsula. During the Silla-Tang war, people of fallen Baekje and Goguryeo helped Silla against Chinese invasion, so Silla could beat China and unified the peninsula. This war helped Korean people to unite mentally.
caption: Korean peninsula in 476 AD. There are three kingdoms and Gaya Union in the picture. This picture shows the heyday of Goguryeo
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