Serbian Prefect Nicholas Altomanović (Vojinovic) lost their territories in conflict with a coalition of: Prince Lazar of Serbia, the Bosnian ban Tvrtko and King Ludwig I (ban Gorjanski). 1. The expansion of parts of Bosnia Nicholas Altomanović possession, after his defeat 1373rd year; 2nd Temporarily taking Dračevica, Konavli and Trebinje by Zeta (Balsic); 3rd Today's borders of Montenegro.
In 1373, a military alliance against Nikola was created, which included Bosnian Ban Tvrtko I Kotromanić, Zetan Ruler Đurađ I Balšić, Mačvan Prince Nikola Gorjanski, and Hungarian King Ludovik I. In the same year, they battled against Nikola and Nikola lost, thus his territory was split between Prince Lazar Hrebeljanović of Serbia, Đurađ I Balšić of Zeta, and Ban Tvrtko I Kotromanić of Bosnia.