Western Liao in the context of "Naimans"

The Western Xia or the Xi Xia (Chinese: 西夏; pinyin: Xī Xià; Wade–Giles: Hsi Hsia), officially the Great Xia (大夏; Dà Xià; Ta Hsia), also known as the Tangut Empire, and known as Mi-nyak to the Tanguts and Tibetans, was a Tangut-led imperial dynasty of China that existed from 1038 to 1227. At its peak, the dynasty ruled over modern-day north-central China, including parts of Ningxia, Gansu, eastern Qinghai, Northern Shaanxi, North Eastern Xinjiang, and Southwest Inner Mongolia, and Southernmost Outer Mongolia, measuring about 800,000 square kilometres (310,000 square miles).

The capital of Western Xia was Xingqing (modern Yinchuan); another major Xia city and archaeological site is Khara-Khoto. Western Xia was annihilated by the Mongols in 1227. Most of its written records and architecture were destroyed, so the founders and history of the empire remained obscure until 20th-century research in China and the West. Today the Tangut language and its unique script are extinct, only fragments of Tangut literature remain.

The Mongol conquest of China was a series of major military efforts by the Mongol Empire to conquer various empires ruling over China for 74 years (1205–1279). It spanned over seventy years in the 13th century and involved the defeat of the Jin dynasty, Western Liao, Western Xia, Tibet, the Dali Kingdom, the Southern Song, and the Eastern Xia. The Mongol Empire under Genghis Khan started the conquest with small-scale raids into Western Xia in 1205 and 1207.

In 1279, the Mongol ruler Kublai Khan formally established the Yuan dynasty in the Chinese tradition, having crushed the last Song resistance, marking the reunification of China under Mongol rule, the first time that non-Han people had ruled the entire country. It was the first time that Tibet was unified with the rest of China.