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The Goryeo–Khitan War was a series of 10th- and 11th-century conflicts between Goryeo and the Khitan Liao dynasty near the present-day border between China and North Korea. ==Background== During the Three Kingdoms of Korea period, Goguryeo occupied the northern Korean Peninsula and parts of Manchuria and inner Mongolia. With Goguryeo's fall in 668, Silla unified the Three Kingdoms, while northern parts of Goguryeo territory were briefly occupied by Silla's ally, Tang China. A former Goguryeo general revived Goguryeo's Manchurian territory as the new kingdom of Balhae. Right after the fall of Goguryeo, the Göktürks were divided and eventually driven out from most of Central Asia by the Tang. Another Turkic tribe, the Uyghurs, replaced the Göktürks, but their control was not very strong. As Balhae, the Uyghur and the Tang Dynasty weakened, the Khitan people, a nomadic confederation located in Manchuria and eastern Mongolia, grew stronger and began to expand their territory. Following Tang's fall in 907, China experienced a long period of civil war. In 911, threatened by Khitan expansion, Balhae sought assistance from the declining Silla of the Korean Peninsula. Records stated that Balhae also requested help from Silla's successor dynasty Goryeo during the Later Three Kingdoms. In 916, the Liao dynasty was founded by the Khitan chief Yelü Abaoji, who was enthroned as Emperor Taizu of Liao, replacing the Uyghurs as the dominant power of what is now Mongolia after the Yenisei Kirghiz and the Tang dynasty defeated the Uyghur Khaganate and left a power vacuum. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Goryeo–Khitan War」の詳細全文を読む スポンサード リンク
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