page_title: Battle of Sirmium
section_title: Aftermath
hierarchical_section_title: Battle of Sirmium / Aftermath
caption_attribution_description: English: The Byzantine Empire and Mediterranean world by 1173 AD
context_page_description: The Battle of Sirmium, Battle of Semlin or Battle of Zemun was fought on July 8, 1167 between the Byzantine Empire, and the Kingdom of Hungary. The Byzantines achieved a decisive victory, forcing the Hungarians to sue for peace on Byzantine terms. The battle consolidated Byzantine control of the western Balkans.
context_section_description: The Hungarians sued for peace on Byzantine terms and recognised the empire’s control over Bosnia, Dalmatia, Croatia south of the Krka River as well as the Fruška Gora. They also agreed to provide hostages for good behaviour; to pay Byzantium a tribute and supply troops when requested. The Battle of Sirmium completed Manuel's drive to secure his northern frontier.
  When Manuel's own son was born, Béla was deprived of the title despot and his position as heir to the imperial throne. In 1172, Stephen III died and Béla, with the help of Emperor Manuel, seized the throne of the Kingdom of Hungary. Béla had to swear that he would never harm Manuel and he remained loyal to the Empire until Manuel's death, but then he conquered lands previously held by the Byzantines.
caption: Map of the Mediterranean lands showing Byzantine control of the western Balkans, c. 1170s
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