The Battle of Rusokastro (Bulgarian: Битка при Русокастро, Greek: Μάχη τοῦ Ῥουσοκάστρου) occurred on July 18, 1332 near the village of Rusokastro, Bulgaria, between the armies of the Bulgarian and Byzantine Empires. The outcome was a Bulgarian victory Historical background In 1328, the emperors of Bulgaria and Byzantium, Michael Asen III and Andronikos III Palaiologos, signed a secret treaty against Serbia. While Michael Asen III was fighting against the Serbs in 1330, the Byzantines invaded Thr…