sentences:  Murad was also obliged to release Branković's two blinded sons, Grgur and Stefan.The restored Serbian Despotate was vassalaged to the Ottomans, so he had to pay taxes and offer military aid.A ten-year truce was established with Hungary, and Vlad II Dracul, Voivode of Wallachia, was no longer obliged to attend Murad's court, though he was still required to pay tribute.