In 1167, the Byzantine Empire faced off against the Hungarian army at Sirmium, located in modern-day Serbia. The battle arose from ongoing territorial disputes and conflicts between the two powers, with the Byzantine Emperor Manuel I Komnenos aiming to consolidate control over the Balkans while countering Hungarian ambitions. The Hungarians, led by their king, sought to expand their influence but underestimated the military prowess and strategic capabilities of the Byzantine forces.

The confrontation unfolded with fierce engagement, featuring skilled cavalry maneuvers and a series of tactical retreats and assaults. The Byzantines, famed for their well-trained troops and superior military organization, mounted a robust defense that ultimately overwhelmed the Hungarian forces. Reports indicate significant casualties on the Hungarian side, which led them to seek a truce following the intense confrontation. The peace negotiations focused on territorial agreements and ensuring stability in the region, reflecting the power dynamics of medieval Eastern Europe.

This battle, while just one of many in the complex tapestry of Byzantine and Hungarian relations, highlighted the shifting balance of power and the Byzantine Empire's capability to fend off invasions from formidable neighbors. The results not only solidified Byzantine control over key territories but also served as a wake-up call for the Hungarians regarding the necessity of military reform and strategic alliances in their ongoing quest for dominance.