Civil War returns to Byzantium as a new Empire emerges in the Balkans.
Below is an artist’s depiction of the coronation of Stefan Dushan as Tsar of the Serbs and the Greeks in Skopje, an image of Tsar Ivan Alexander, a map of Bulgaria during Ivan Alexander's reign, a map of the Battle or Rusokastro, and a general map of the region during this time.
This video covers the Battle of Rusokastro. It's in Bulgarian but you can turn on English subtitles.