Ban Borić appears as the first known Bosnian ruler in 1154, as an Hungarian vassal, who participated in the Siege of Braničevo as part of the Hungarian King forces In 1167 He was involved in offensives against the Byzantines when he provided troops for Hungarian armies War ended with the retreat of Hungarian army in Battle of Sirmium, near Belgrade in 1167. Borić's involvement in the war indicates that Bosnia was part of the Hungarian kingdom at that time. 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. Bosnia was part of Byzantium from 1167 to 1180, but as Bosnia was distant land, rule over it was probably nominal.