Editing Władysław III of Poland (section)

===Discord and unrest, 1440–1442===
{{further|List of wars involving Hungary}}
[[File:Thuróczy krónika - Hunyadi János.jpg|thumb|right|[[John Hunyadi]], who supported Władysław's claim to the Hungarian throne and aided him militarily. Depiction from the ''[[Chronica Hungarorum]]'', 1488.]]

Shortly after Władysław's accession the conflict with the supporters of Elizabeth deepened.{{sfn|Museranu|2018|page=71}} The western and northern parts of the country remained on the side of the queen and opposing [[magnate]]s, chiefly the [[Counts of Celje]] (Cilli), the [[Garai family]] and [[Dénes Szécsi|Dénes Szécsi, Archbishop of Esztergom]].{{sfn|Museranu|2018|page=71}} In turn, the eastern regions and [[Transylvania]] upheld Władysław and his partisans, among them [[John Hunyadi]] who became a leading political and military figure in Hungary.{{sfn|Museranu|2018|pages=71–72}}

In order to assert her claim, Elizabeth had to maintain the wealthy mining counties in what now constitutes [[Slovakia]] and hired Hussite [[mercenaries]] from Bohemia commanded by [[John Jiskra of Brandýs|John Jiskra]].{{sfn|Museranu|2018|page=72}} Jiskra undertook a quick campaign and occupied much of the fortresses and defensive posts in northern Hungary, often with the support of local populations and devotees that held Jiskra in high regard because of his fight for religious freedoms.{{sfn|Museranu|2018|page=72}} As a benefactor to the mercenaries, Elizabeth had to pawn the Holy Crown and transfer tutelage over her newborn son to Frederick III.{{sfn|Museranu|2018|page=72}} However, this proved insufficient to fund the war against Władysław; she was then forced to handover her privately owned Austrian estates and the Hungarian [[Sopron County|County]] of [[Sopron]] to the Habsburgs in late 1440 and early 1441.{{sfn|Museranu|2018|page=72}} This conduct alienated many of the lords that initially supported Elizabeth's cause, including [[Nicholas of Ilok]], [[Ban of Croatia]], who switched sides and allied himself with Władysław and John Hunyadi.{{sfn|Museranu|2018|page=72}}

The western territories as well as some 70 fortresses under [[Ulrich II, Count of Celje]] in modern-day Austria, Croatia and [[Slovenia]] remained stalwart and loyal to the queen.{{sfn|Museranu|2018|page=72}} Before the end of 1440, Hunyadi attacked [[Győr]] but was unable to take the garrisoned city.{{sfn|Museranu|2018|page=73}} He was, however, successful in capturing local townships and villages around Buda and Székesfehérvár to prevent the escape of nobles and designated traitors.{{sfn|Museranu|2018|page=73}} This proved paramount when Ulrich II made an attempt to flee to [[Bratislava]] (Pozsony); he was caught by a Polish detachment and subsequently imprisoned at Władysław's behest.{{sfn|Museranu|2018|page=73}} Concurrently, [[Ladislaus Garai]] instigated a rebellion in the south.{{sfn|Museranu|2018|pages=73–74}} Hunyadi, together with Nicholas of Ilok, annihilated Garai's army at [[Bátaszék]] on 10 September 1440.{{sfn|Museranu|2018|pages=73–74}} In January 1441, Ulrich was released from captivity, pledged an oath of loyalty to Władysław and freed the hostages held by his troops.{{sfn|Museranu|2018|pages=73–74}}

Elizabeth prolonged her resistance until December 1442, when a peace treaty was signed at Győr under the auspices of Cardinal [[Julian Cesarini]].{{sfn|Reddaway|Penson|Halecki|Dyboski|1950|page=239}} Elizabeth died not long after meeting Władysław and exchanging gifts; her supporters claimed that she was poisoned on his orders to prevent their marriage.{{sfn|Setton|1969|page=287}} Cesarini had the treaty ratified by Frederick under the pressure of Pope Eugene, though Frederick abstained from doing so until May 1444.{{sfn|Setton|1969|page=287}} The internal unrest caused Hungary to become vulnerable militarily and was severely weakened for the Turkish campaign.{{sfn|Reddaway|Penson|Halecki|Dyboski|1950|page=239}}