Parts of Kosovo became domains of Vukašin Mrnjavčević, but Vojislav Vojinović expanded his demesne further onto Kosovo. The armies of Vukašin from Pristina and his allies defeated Vojislav's forces in 1369, putting a halt to his advances. After the Battle of Maritsa on 26 September 1371 in which the Mrnjavčević brothers lost their lives, Đurađ I Balšić of Zeta took Prizren and Peć in 1372. A part of Kosovo became the demesne of the Lazar of Serbia.