Władysław III of Poland

Władysław III of Poland, born on October thirty-first, fourteen twenty-four, ascended to the throne at a tender age of ten in fourteen thirty-four, following the death of his father. Due to his youth, he was deemed unfit to rule independently, leading to Cardinal Zbigniew Oleśnicki serving as regent. During this time, a provisional council exercised power in Władysław's name, while his legitimacy faced challenges from Lesser Polish nobles who supported Siemowit V of Masovia, a claimant of Piast lineage. Tensions escalated when Spytko III of Melsztyn accused the regent and the Catholic Church of exploiting the young king's position, culminating in Spytko's death at the Battle of Grotniki in fourteen thirty-nine, which quelled the immediate dissent.

Władysław's reign was marked by the ongoing Polish–Teutonic War, which had begun under his father's rule in fourteen thirty-one. The Teutonic Knights allied with Švitrigaila and the Livonian Order against Poland and Lithuania shortly after Władysław's coronation. In response, the king and the Polish Royal Council fortified border regions and dispatched troops to Lithuania, embroiled in civil strife since fourteen thirty-two. The conflict reached a turning point at the Battle of Wiłkomierz, where Władysław's forces triumphed, leading to the Peace of Brześć Kujawski in December fourteen thirty-five, which diminished Teutonic power in East-Central Europe.

Under Władysław's leadership, the Kingdom of Poland aimed to reclaim lost territories such as Silesia and Pomerania while expanding its influence in neighboring regions. In fourteen forty, he was elected King of Hungary and Croatia after the death of Albert II of Germany. This election was contested by Albert's widow, Elizabeth of Luxembourg, who sought to place her infant son on the throne. However, the subsequent political turmoil, including the Habsburgs' hostilities and the Ottoman threat, solidified Władysław's claim to the Hungarian crown.

As the Ottoman grip on the Balkans weakened post-Hungarian–Ottoman War, Władysław was urged by the papacy to initiate the Crusade of Varna. Despite initial victories, the Christian forces faced overwhelming odds at Varna, where Władysław reportedly fell in a valiant cavalry charge against Sultan Murad II. His body was never recovered, leading to various legends about his fate. Władysław's legacy remains complex; he is viewed differently in Poland and Hungary, yet he is remembered as a significant figure in Bulgaria, which suffered under Ottoman rule. Following his death, his younger brother Casimir IV succeeded him in Poland, while his rival Ladislaus V the Posthumous took the Hungarian throne.