What the records say
- When
- May 580 – 582
- Kind
- Siege
- Coordinates
- 44.98° N, 19.61° E
- Description
- 580 siege
Siege of Sirmium
The siege of Sirmium in 580–582 was a decisive event in the history of the Balkans. The fall of the city to the Avars deprived the Byzantine Empire of its major stronghold on the northwestern Danube, opening the path for devastating incursions by the Avars and their Slavic allies into the Balkans.
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