Ulrich II, Count of Celje, a prominent noble from the region known as the County of Cilli, was assassinated in Belgrade, a vital political hub in the Balkans. This assassination represented a culmination of intense political strife that characterized the broader struggles for power among various nobles and territorial rulers in the region during the 15th century. The County of Cilli was a significant player in the politics of Central Europe, often entangled in the larger web of alliances and rivalries involving the Habsburgs and the Ottoman Empire.

The act of assassination was likely premeditated, motivated by a combination of political rivalry and personal enmity. Ulrich II's death created a power vacuum in the County of Cilli, which left it vulnerable to territorial claims from both internal and external factions. Following his assassination, the region faced escalating tensions and conflicts that underscored the fragility of political stability in the area. It also marked a shifting landscape in the political allegiances that would follow, influencing relationships between various noble houses and foreign powers.

The aftermath of Ulrich’s assassination saw his family struggling to maintain control of their lands against encroaching rivals. This assassination not only impacted the Count’s immediate political circle but also resonated throughout regional politics, signaling the volatile nature of power in the Balkans. It set the stage for future confrontations and diplomatic maneuvering, illustrating how the elimination of a single figure could lead to substantial shifts in political fortunes.