FTP, name this country whose modern day capital is Belgrade.
The most famous ruler of this country won the Battle of Velbuzd in 1330 and married a princess of the nation defeated there, Helen. Theodore Metochites arranged the marriage of the five-year-old princess Simonis to one ruler of this country. One ruler of this country changed his title after capturing Serres, and a despot of Serres, John Ugljesa (oog-lye-sha), joined his brother in defeat at the battle of Chernomen. That leader, Vukashin, had a son who died at the battle of Rovine while allied with Mircea (meer-chuh) the Old of Wallachia. The most famous ruler of this land had the sobriquet "Silni," promulgated the Zakonik and allied with the Byzantine pretender John Cantacuzenus before conquering Albania and Macedonia. That king was succeeded by his son Urosh, and himself succeeded his father Milutin. Famously ruled by Stefan Dushan, under prince Lazar Hrebeljanovic it would suffer defeat by the Ottomans at the field of Kosovo. FTP, name this country whose modern day capital is Belgrade.
The most famous ruler of this country won the Battle of Velbuzd in 1330 and married a princess of the nation defeated there, Helen.
{Serbia}