Bulgarian–Serbian Wars (medieval)
| Bulgarian-Serbian Wars | |||||||||
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 Clockwise from top left: Ivan Alexander of Bulgaria; Stefan Dušan of Serbia; Boris I of Bulgaria; Stefan Dragutin of Serbia. |
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| Belligerents | |||||||||
 Bulgarian Empire
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 Serbian kingdoms (Rascia, Doclea)
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| Commanders and leaders | |||||||||
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Presian Boris I Simeon Marmais Theodore Sigritsa Samuil Michael III |
Vlastimir Časlav Jovan Vladimir Milutin Stefan Uroš III Dečanski |
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The Bulgarian-Serbian wars were a series of conflicts between the Bulgarian Empire and the medieval Serbian states of Raška, Duklja, and the Kingdom of Serbia between the 9th and 14th centuries in western Serbia, Bosnia, and Kosovo in the western Balkans.
Before the 12th century, the Serbian states were dependent upon and strongly influenced by the dominant Balkan powers, the Bulgarian and Byzantine Empires. The rulers of both those countries sought to control Serb princes to use them as allies in the Byzantine–Bulgarian wars. The first war between Bulgarians and Serbs occurred during the reign of Khan Presian between 839 and 842, precipitated by Byzantine diplomacy. Later after series of campaigns the Bulgarian Emperor Simeon I destroyed the Serb state in 924. The Bulgarian Emperor Peter I granted formal independence to Serbia in 931 and appointed his protégé Časlav Klonimirović as its ruler. They were again subjected by Emperor Samuel in 998.
In the 13th century Stefan Dragutin and his brother Stefan Milutin fought as Hungarian vassals against the Bulgarian governors of Belgrade and Braničevo, Darman and Kudelin and managed to defeat them. In 1327 the Emperors of Bulgaria and Byzantium signed an anti-Serbian alliance to stop Serbia's growing power but in 1330 Bulgarian Emperor Michael III Shishman was defeated by Stefan Dečanski in the battle of Velbazhd.
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