|Elevation||900 m (2,953 ft)|
The famous Battle of Pliska was fought in the pass on July 26, 811 between the armies of Bulgarian Empire led by Khan Krum and the Byzantine Empire under Nicephorus I which ended with a decisive Bulgarian victory and the death of the Byzantine Emperor.
- Zlatarski, Vasil N. (1918). Medieval History of the Bulgarian State, Vol I: History of the First Bulgarian Empire, Part I: Age of Hun-Bulgar Domination (679-852) (in Bulgarian). Sofia: Science and Arts Publishers, 2nd Edition (Petar Petrov, Ed.), Zahari Stoyanov Publishers, 4th Edition, 2006. ISBN 954-739-928-4.
- Runciman, Steven (1930). A History of the First Bulgarian Empire. G. Bell & Sons, London.
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