At the same time (1403 or early in 1404) Stefan was attacked lands of Branković around river Sitnica, and then began to attack the areas under Ottoman control, in which it might have had and Hungarian military support troops. It is not known exactly from which cities and regions has managed to push the Ottomans, but it is thought that his offensive was directed toward eastern Serbia, and Kosovo. After these successes, he was able to make peace with Branković, and at the same time through his mother reconciled with Süleyman.