Battle of Klokotnitsa
The Battle of Klokotnitsa (, "Bitkata pri Klokotnitsa") occurred on 9 March 1230 near the village of Klokotnitsa (today in Haskovo Province, Bulgaria) between Second Bulgarian Empire and Empire of Thessalonica. As a result, Bulgaria emerged once again as the most powerful state in South-Eastern Europe. Nevertheless, Bulgarian power was soon to be contested and surpassed by the rising Empire of Nicaea.