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Maurice’s Balkan campaigns

For twenty years Emperor Maurice fought to hold the Danube frontier against the Avars of khagan Bayan and the Slavs. After peace with Persia in 591 his generals carried the war across the Danube and defeated the Avars in their own land, but in 602 the army, ordered to winter beyond the river, mutinied and overthrew him.

Date
582–602year known · duration: ≈ 20 years
Place
Viminaciumapproximate locationtoday: near Kostolac, Serbia · Balkans and Anatolia
Participants
Maurice, Avars, Bayan I, Byzantine Empire
Threads
Early medieval Europe (500–1000)
Also known as
Maurice's Balkan campaigns; Siege of Sirmium; Осада Сирмия; Balkan campaigns of Maurice; Battle of Viminacium; Битва при Виминациуме

The war began before Maurice came to the throne. In 580 khagan Bayan bridged the Sava and laid siege to Sirmium, the empire’s main stronghold on the north-western Danube frontier. With the main Byzantine forces tied down in the war with Persia, the weak garrison held out for almost three years, until Tiberius II gave up the city in the winter of 581/582. The Avars spared the inhabitants but took their possessions and 240,000 solidi — the arrears of three years’ tribute; many refugees, as funerary inscriptions show, settled at Salona. In 583 the Avars took Viminacium and other Danube towns and advanced as far as Anchialus on the Black Sea, while Slav raiders reached Greece.

Only after the peace of 591 with Khosrow II, whom Maurice had helped to regain the Persian throne, could the emperor move his veteran eastern armies to the Balkans. From 593 the general Priscus crossed the Danube and fought the Slavs in their own lands, in present-day Wallachia, and in 599 Priscus and Comentiolus crossed the river near Viminacium and defeated the Avars in open battle in their homeland; several of Bayan’s sons fell.

In 602 Maurice ordered the army to spend the winter on the northern bank of the Danube. The soldiers mutinied and marched on Constantinople; Maurice was overthrown and killed, and Phocas took the throne. In the following decades the Danube frontier collapsed, and Slav settlement of the Balkans intensified, above all under Heraclius. The war is known chiefly from the history of Theophylact Simocatta.

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Sources

  1. Wikipedia (English): Maurice's Balkan campaigns
  2. Wikipedia (English): Siege of Sirmium
  3. Wikipedia (Russian): Кампании Маврикия на Балканах
  4. Wikipedia (Russian): Осада Сирмия
  5. Whitby M. The Emperor Maurice and His Historian: Theophylact Simocatta on Persian and Balkan Warfare. — Oxford: Clarendon Press, 1988.
  6. Pohl W. The Avars: A Steppe Empire in Central Europe, 567–822. — Ithaca: Cornell University Press, 2018.
  7. Wikidata: Q805050