Vuk headed the Lazarević army, which was victorious, but reaching Novo Brdo, the brothers had a quarrel and Vuk went to the Ottoman side, to the new sultan (actually co-ruler with his three brothers) Suleyman (I) Çelebi.
Vuk dirixiu o exército dos Lazarević, que resultou vitorioso, pero ao chegaren a Novo Brdo, os irmáns tiveron unha pelexa e Vuk pasouse aos otománs, facéndose súbdito do novo sultán (realmente cogobernante cos seus 3 irmáns) Suleiman I (Süleyman Çelebi).