Battle of Mount Belasitza after which were blinded captured Bulgarian soldiers is among the most dramatic pages of Bulgarian history. The loss of a significant part of the army and later followed the death of Tsar Samuil led to the demise of the First Bulgarian Empire.
Разширената статия за битката, по която е направено видеото.
http://ald-bg.narod.ru/materiali/Battle/06_belasiza/06_belasiza.htm