Goryeo–Khitan War
The Goryeo–Khitan War (Chinese: 遼麗戰爭; Korean: 고려-거란 전쟁) was a series of 10th- and 11th-century conflicts between the Goryeo dynasty of Korea and the Khitan-led Liao dynasty of China. == Goryeo–Khitan relations == Silla experienced a period of decline starting in the latter half of the 9th century that continued until it was ultimately succeeded by Goryeo.