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Byzantine–Bulgarian wars

Byzantine–Bulgarian wars
BG BYZ.JPG
Clockwise from right: The Battle of Anchialus; Khan Omurtag; The Emperors of Bulgaria and Byzantium negotiate for peace; Emperor Nikephoros II Phokas.
Date 680–1355 (675 years)
Location Balkan peninsula
Result Ottoman rule of the Balkans
Territorial
changes
Both empires had numerous territorial changes
Belligerents
First Bulgarian Empire
Second Bulgarian Empire
Byzantine Empire
Commanders and leaders
Asparukh
Tervel
Kormisosh
Vinekh
Telets
Telerig
Krum
Omurtag
Malamir
Presian I
Boris I
Simeon I
Peter I
Boris II
Samuel
Gavril Rodomir
Ivan Vladislav
Presian II
Peter II
Peter III
Peter IV
Ivan Asen I
Ivanko
Kaloyan
Ivan Asen II
Michael Asen I
Mitso Asen
Constantine I
Ivaylo
Smilets
Theodore Svetoslav
George II
Michael Asen III
Ivan Stephen
Ivan Alexander
Constantine IV
Justinian II
Philippikos Bardanes
Constantine V
Nikephoros I Logothetes
Michael I Rangabe
Leo V the Armenian
Theophilos
Michael III
Leo VI the Wise
Alexander
Leo Phokas the Elder
Romanos I
Nikephoros II Phokas
John I Tzimiskes
Basil II the Bulgar-slayer
Gregory Taronites  
Nikephoros Ouranos
Michael IV the Paphlagonian
Michael VII Doukas
Isaac II Angelos
Alexios III Angelos
John III Doukas Vatatzes
Theodore II Laskaris
Michael VIII Palaiologos
Andronikos II Palaiologos
Michael IX Palaiologos
Andronikos III Palaiologos

The Byzantine–Bulgarian wars were a series of conflicts fought between the Byzantines and Bulgarians which began when the Bulgars first settled in the Balkan peninsula in the 5th century, and intensified with the expansion of the Bulgarian Empire to the southwest after 680 AD. The Byzantines and Bulgarians continued to clash over the next century with variable success, until the Bulgarians, led by Krum, inflicted a series of crushing defeats on the Byzantines. After Krum died in 814, his son Omurtag negotiated a thirty-year peace treaty. In 893, during the next major war, Simeon I, the Bulgarian emperor, defeated the Byzantines while attempting to form a large Eastern European Empire, but his efforts failed.

In 971 John I Tzimiskes, the Byzantine emperor, subjugated much of the weakening Bulgarian Empire, facing wars with Russians, Pechenegs, Magyars and Croatians and by defeating Boris II and capturing Preslav, the Bulgarian capital. Constantinople under Basil II completely conquered Bulgaria in 1018 as a result of the 1014 Battle of Kleidion. There were rebellions against Byzantine rule from 1040 to 1041, and in the 1070s and the 1080s, but these failed. In 1185, however, Theodore Peter and Ivan Asen started a revolt, and the weakening Byzantine Empire, facing internal dynastic troubles of its own, was unable to prevent the revolt from being successful.

After the Fourth Crusade conquered Constantinople in 1204, Kaloyan, the Bulgarian emperor, tried to establish friendly relations with the crusaders, but the newly created Latin Empire spurned any offer of alliance with the Bulgarians. Because of his cold reception, Kaloyan allied with the Nicaeans, one of the Byzantine states created after the fall of Constantinople, instead, which reduced the crusaders' power in the area. Even though his nephew Boril allied with the Latin Empire, Boril's successors sided with the Nicaeans, despite a few continuing attacks from them. After the Latin Empire collapsed, the Byzantines, taking advantage of a Bulgarian civil war, captured portions of Thrace, but the Bulgarian emperor Theodore Svetoslav retook these lands. The Byzantine-Bulgarian relations continued to fluctuate until the Ottoman Turks captured the Bulgarian capital in 1393 and the Byzantine in 1453.


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