His rise to throne has not brought peace and stability to Balkans, on the contrary, he quickly turned against themselves and their former allies. Serbian Parliament, were sent by Stefan to regulate relations and confirming previous agreements, but not only that he failed, but he barely managed to save their own lives, but Musa was given permission to dig up Vuk Lazarević and his remains transferred to Serbia. This was a clear declaration of war and Stefan immediately began offensive. He entered the Pirot area from which they launched attacks on the Ottomans, who had stopped only when he sent a mission of Musa and offered talks.