sep 9, 1141 - Battle of Qatwan
Description:
The Battle of Qatwan was fought in September 1141 between the Qara Khitai (Western Liao) and the Seljuq Empire and its vassal-state the Kara-Khanids. The Seljuqs were decisively defeated, which signalled the beginning of the end of the Great Seljuk Empire
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