The Barbarian Empires of the Steppes.  Episode 29,  Western Mongol Expansion. 

 - 1 online resource (streaming video file) (30 minutes):  digital, .flv file, sound 
<br/><br/> Title from title frames.  Film  In Process Record. 
<br/><br/>Kenneth W. Harl 
<br/><br/> Originally produced by The Great Courses in 2014. 
<br/><br/> Why did Genghis Khan have his third son, Ögedei, succeed him rather than his oldest, Jochi? Find out as you embark on the Mongols' vast westward expansion. Witness Ögedei's efforts to transition from a tributary-based empire to a tax-based one; then follow Batu's invasion of Russia and Christian Europe, where he encounters an unexpected obstacle: fortified masonry castles. 
<br/><br/><br/>Mode of access: World Wide Web. 
<br/><br/><br/>In English 
<br/><br/><label>Publisher. No.: </label>6695045  Kanopy 
<br/><br/><label>Subjects--Topical Terms: </label><br/>History, Ancient.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Education films.