| Conflict: | Battle of Adrianople |
| Partof: | the Byzantine-Bulgarian Wars |
| Date: | 1254 |
| Place: | Adrianople |
| Result: | Nicaean victory |
| Combatant1: | Bulgarian Empire |
| Combatant2: | Empire of Nicaea |
| Commander1: | Michael Asen I of Bulgaria |
| Commander2: | Theodore II Lascaris |
The Battle of Adrianople was fought in 1254 between the Byzantine Greek Empire of Nicaea and the Bulgarians. Michael Asen I of Bulgaria tried to reconquer land taken by the Empire of Nicaea, but the swift advance of Theodore II Lascaris caught the Bulgarians unprepared. The Byzantines were victorious.[1]