 Aside from the machinations of Yelü Yixin , the only other event of note from Emperor Daozong 's rule was a war fought between 1092 and 1102 between the Liao and a Mongolian , possibly Tatar tribe , group known as the Zubu . The Zubu were located at the northwest border of Liao territory and had fought several wars with the Liao when the Liao tried to expand in that direction . In 1092 the Liao attacked several other tribes in the northwest , and by 1093 the Zubu attacked the Liao , striking deep into Khitan territory . It took until 1100 for the Liao to capture and kill the Zubu chieftain , and another two years to fight off the remaining Zubu forces . The war against the Zubu was the last successful military campaign waged by the Liao dynasty . 
