Kings and Generals animated historical animated documentary series on the Byzantine-Crusader-Bulgarian Wars, as well as the Fourth Crusade and the Sack of Constantinople, fragmentation, and restoration of the Eastern Roman Empire and Frankokratia continues with an episode on the battle of Adrianople of 1205 during which the emperor of the Latin empire Baldwin I fought the tsar of Bulgaria Kaloyan. This video also describes the fragmentation of the Eastern Roman Empire in the aftermath of the Sack of Constantinople and what happened in the region after Adrianople.
