Siege of Varna (1201)
1201 CE.
Shown on the map at 43.208°, 27.917°.
The siege of Varna (Bulgarian: Обсада на Варна) took place between 21 and 24 March 1201 at Varna, on the Bulgarian Black Sea coast between the Bulgarians and the Byzantines. The Bulgarians were victorious and captured the city, which led to the massacre of Byzantine prisoners as a revenge for the Battle of Klyuch.
Text from the Wikipedia article Siege of Varna (1201), licensed CC BY-SA 4.0.