The Tangut Western Xia controlled the Hexi Corridor and the eastern Silk Road for nearly two centuries, maintaining cultural and political independence from both Song China and the Liao/Jin empires before Genghis Khan's campaigns annihilated the state.
The Western Xia (Tangut state) was destroyed in 1227 CE by the Mongols under Genghis Khan, who ordered the near-total massacre of the Tangut people and annexation of their territory.
The atlas holds 2 border frames for Western Xia — the shape you scrub through changes in 1038 · 1150.
Grousset covers the Western Xia among the contested frontier states of inner Asia and explains their destruction by the Mongols.
Weatherford recounts the Mongol campaigns against the Western Xia and Genghis Khan's death during the final campaign.