In 1441, he defeated a raid led by Ishak Pasha of Smederevo.[1] He nearly annihilated Mezid Bey's army in Transylvania on 22 March 1442, and in September he defeated the revenge attack of Şihabeddin Pasha, governor-general of Rumelia.[2] Branković, hoping to liberate Serbia, also lent his support after Novo Brdo, the last major Serbian city, fell to the Ottomans in 1441.