The crusaders' victory at Belgrade over the Sultan who had conquered Constantinople generated enthusiasm throughout Europe. Processions to celebrate Hunyadi's triumph were made in Venice and Oxford. However, in the crusaders' camp unrest was growing, because the peasants denied that the barons had played any role in the victory. In order to avoid an open rebellion, Hunyadi and Capistrano disbanded the crusaders' army.

Meanwhile, a plague had broken out and killed many people in the crusaders' camp. Hunyadi was also taken ill and died near Zimony (present-day Zemun, Serbia) on 11 August.