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Period: 1205 to 1209
The first attack
The first attack was directed against the Tangut kingdom of Hsi Hsia (Xi Xia), a northwestern border-state of China, and ended in a declaration of allegiance by the Xi Xia king. -
1206
Mongol empire foundation
In 1206, Genghis Khan founded the Mongol empire -
1215
The fall of Beijing
The fall of Beijing marked the loss of all the territory north of the Huang He (Yellow River) to the Mongols. -
1226
A destructive campaign was launched against Xi Xia
A destructive campaign was launched against Xi Xia in 1226–27 because the Xi Xia king had refused to assist the Mongols in their expedition against Khwārezm.