The relationship between Prince Stefan and Branković family over the years is not known from historical sources. It is known that they were able, with the most money that Vuk Branković is left on the guarding in the Kotor and Republic of Ragusa, to recover some of the former countries. In early 1402, their area included parts of Kosovo, Polimlje, Sjenica and Brskovo, and since the spring of that year they became Bayezid's vassals, with the same responsibilities Prince Stefan had. Beyond their control remained Zvečan, Jeleč and Gluhavica, which were held by the Ottomans, and Priština, which we know that in March the same year, was part of the state of Stefan Lazarević.