After a united Bulgarian, Cumanian and Vlach army defeated the Byzantines in the Battle of Arcadiopolis in 1194, Béla was willing to assist the Byzantine Empire.
Setelah Bulgaria bersatu, tentara Cuman dan Vlach mengalahkan Bizantium di dalam Pertempuran Arcadiopolis pada tahun 1194, Béla bersedia membantu Kekaisaran Bizantium.