Byzantine-Bulgarian War of 913-927
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Was a war between the Bulgarian Empire and the Byzantine Empire.
Chronology
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August 913: Toward the end of July 913 the Bulgarian monarch launched a campaign at the head of a large army, and in August he reached Constantinople unopposed.
September 914: Simeon I of Bulgaria invaded Thrace in the summer of 914 and captured Adrianople.
November 914: After the Bulgarian Tsar Simeon I captured Adrianople in 914, the Byzantine Emperor Leo VI negotiated the city's return by paying a large ransom. This event highlighted the ongoing power struggles between the Byzantine Empire and the Bulgarian Empire during the 9th and 10th centuries.
August 917: Battle of Achelous.
January 919: With the Serbian threat eliminated and the bulk of the Byzantine army destroyed, in 918 Simeon I personally led a campaign in the Theme of Hellas and penetrated deep to the south, reaching the Isthmus of Corinth.
April 921: Battle of Pegae.
January 922: Simeon I of Bulgaria had to deal with the Serbian prince Petar Gojniković, who had responded positively to the Byzantine proposal for an anti-Bulgarian coalition. Serbia was turned into a puppet in until 921.
September 924: In the summer of 924, Simeon nevertheless arrived at Constantinople and demanded to see the patriarch and the emperor. He conversed with Romanos on the Golden Horn on 9 September 924 and arranged a truce, according to which Byzantium would pay Bulgaria an annual tax, but would be ceded back some cities on the Black Sea coast.
January 925: Serbia was annexed as a Bulgarian province, expanding the country's border to Croatia.
January 923: The Bulgarian control over Serbia did not last long, because Serbian ruler Zaharija was raised in Constantinople where he had been heavily influenced by the Byzantines. Soon Zaharija openly declared his loyalty to the Byzantine Empire and commenced hostilities against Bulgaria.
September 913: Toward the end of July 913 the Bulgarian monarch launched a campaign at the head of a large army, and in August he reached Constantinople unopposed.
September 914: In the summer of 914 the Bulgarian army invaded the themes of Thrace and Macedonia. Simultaneously, the Bulgarian troops penetrated into the regions of Dyrrhachium and Thessalonica to the west.
Was a treaty that ended the Byzantine-Bulgarian war of 913-927.
November 927: Byzantium recognizes the imperial title of the Bulgarian monarchs and the Bulgarian Patriarchate. The treaty restored the border approximately along the lines agreed in 904: the Bulgarians returned most of Simeon I's conquests in Thrace, Thessaly and Hellas and retained firm control over most of Macedonia and the larger part of Epirus.
