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Battle of Acheloos

Battle of Achelous
Part of the Byzantine–Bulgarian Wars:
War of 913–927
Simeon the Great anonymous seal.jpg
Seal of Simeon I
Date 20 August 917
Location Achelous river near Anchialus
Result Decisive Bulgarian victory
Belligerents
Bulgarian Empire Byzantine Empire
Commanders and leaders
Simeon I of Bulgaria Leo Phocas
Strength
60,000 62,000
Casualties and losses

Unknown

Light

Massive

60,000

Coordinates: 42°38′35″N 27°38′12″E / 42.64306°N 27.63667°E / 42.64306; 27.63667

Unknown

Massive

The Battle of Achelous or Acheloos (Bulgarian: Битката при Ахелой, Greek: Μάχη του Αχελώου), also known as the Battle of Anchialus, took place on 20 August 917, on the Achelous river near the Bulgarian Black Sea coast, close to the fortress Tuthom (modern Pomorie) between Bulgarian and Byzantine forces. The Bulgarians obtained a decisive victory which not only secured the previous successes of Simeon I but made him de facto a ruler of the whole Balkan Peninsula excluding the well-protected Byzantine capital Constantinople and the Peloponnese.

The battle was one of the worst disasters ever to befall a Byzantine army, and conversely one of the greatest military successes of Bulgaria. Among the most significant consequences was the official recognition of the Imperial title of the Bulgarian monarchs, and the consequent affirmation of Bulgarian equality vis-à-vis Byzantium.


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