The foundation of the First Bulgarian Empire. The army of Asparukh is in red. The army of Constantine IV is in blue.
Date
Summer, 680
Location
The Ongal area probably in Danube delta (present-day Tulcea County, Romania)
Result
Bulgar victory
Formation of Danube Bulgaria
Belligerents
Bulgars Seven Slavic tribes
Byzantine Empire
Commanders and leaders
Asparukh
Constantine IV
Strength
around 10-12,000[1][2][3]
"all the themata"[4] from 15 - 25,000[5][6][7]
Casualties and losses
Light
Heavy
v
t
e
Byzantine–Bulgarian wars
Early wars
Ongal
1st Anchialus
1st Marcellae
Rishki Pass
2nd Anchialus
Litosoria
2nd Marcellae
Krum's campaigns
Serdica
Pliska
Debeltos
Versinikia
1st Adrianople
Burdizon
Simeon I's campaigns
War of 894–896
Boulgarophygon
War of 913–927
Achelous
Katasyrtai
Pegae
Constantinople
Sviatoslav's invasion of Bulgaria
1st Arcadiopolis
Dorostolon
Byzantine conquest of Bulgaria
Trajan's Gates
1st Thessalonica
Spercheios
Skopje
2nd Thessalonica
Kreta
3rd Thessalonica
Kleidion
Strumitsa
Bitola
Setina
Dyrrhachium
Uprising of Peter Delyan
4th Thessalonica
5th Thessalonica
Ostrovo
Second Bulgarian Empire
Lovech
Tryavna
2nd Arcadiopolis
Serres
Varna
Klokotnitsa
2nd Adrianople
Uprising of Ivaylo
Devina
Skafida
Rusokastro
The Battle of Ongal took place in the summer of 680 in the Ongal area, an unspecified location in and around the Danube delta near the Peuce Island, present-day Tulcea County, Romania. It was fought between the Bulgars, who had recently invaded the Balkans, and the Byzantine Empire, which ultimately lost the battle. The battle was crucial for the creation of the First Bulgarian Empire.
^Stoyanov, Aleksandr (July 2019). "The Size of Bulgaria's Medieval Field Armies: A Case Study of Military Mobilization Capacity in the Middle Ages". Journal of Military History. 83 (3): 719–746.
^Образуване на българската народност. Димитър Ангелов (Издателство Наука и изкуство, "Векове", София 1971) с. 202—203.
^Dennis P. Hupchick, The Bulgarian-Byzantine Wars for Early Medieval Balkan Hegemony: Silver-Lined Skulls and Blinded Armies, Springer, 2017, ISBN 3319562061, p. 49.
^The Chronicle of Theophanes Confessor. Byzantine and Near Eastern History, AD 284-813. Oxford, 1997, p. 498
^Treadgold, Warren (1997). A History of the Byzantine State and Society. Stanford, California: Stanford University Press. p. 576. ISBN 0-8047-2630-2..
^Byzantium in the Seventh Century: The transformation of a Culture, J. F. Haldon, Cambridge University Press, 1997, ISBN 052131917X, стр. 253.
^Whittow, Mark (1996). The Making of Byzantium, 600–1025. Berkeley and Los Angeles, California: University of California Press. p. 188. ISBN 978-0-520-20496-6..
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