Question: Fuelled by the earlier conflicts of Matthias Corvinus king of Hungary battled which empire during the Battle of Leitzersdorf?

<P0-S0>  After conducting several military campaigns, he was elected King of Bohemia in 1469 and adopted the title Duke of Austria in 1487. <P0-S1>  He was the son of John Hunyadi, Regent of Hungary, who died in 1456. <P0-S2>  In 1457, Matthias was imprisoned along with his older brother, Ladislaus Hunyadi, on the orders of King Ladislaus V of Hungary. <P0-S3>  Ladislaus Hunyadi was executed, causing a rebellion that forced King Ladislaus to flee Hungary. <P0-S4> Matthias Corvinus, also called Matthias I (Hungarian: "Hunyadi Mátyás" , Croatian: "Matija Korvin" , Romanian: "Matei Corvin" , Slovak: "Matej Korvín" , ; 23 February 1443 – 6 April 1490), was King of Hungary and Croatia from 1458 to 1490. <P0-S5>  After the King died unexpectedly, Matthias's uncle Michael Szilágyi persuaded the Estates to unanimously proclaim Matthias king on 24 January 1458. <P0-S6>  He began his rule under his uncle's guardianship, but he took effective control of government within two weeks. <SEP> <P1-S0> The Treaty of Brno was a draft to the Peace of Olomouc developed in March 1478 in Brno by the envoys of Matthias Corvinus of Hungary and King Vladislaus II of Bohemia and Hungary in an effort to end the Bohemian War (1468-1478). <P1-S1>  Corvinus accepted the accord and slightly modified it on 20 September 1478, which determined the division of Bohemian territories. <P1-S2>  Based on the terms of the treaty, Vladislaus would cede the territories of Moravia, Silesia, and Lusatia to Cornivus. <P1-S3>  If Matthias perished, then Vladislaus was permitted to redeem these lands for 400,000 florins. <P1-S4>  Moreover, both monarchs would be permitted to utilize the title "King of Bohemia". <P1-S5>  However, only Matthias was required to address the other claimant as the "King of Bohemia". <SEP> <P2-S0>  Fuelled by the earlier conflicts of Matthias Corvinus and Frederick III, Holy Roman Emperor it marked the end of anti-Ottoman preparations and initiations of a holy war. <P2-S1>  It was the only open field battle of the Austro-Hungarian War, and the defeat meant – in long terms – the loss of the Archduchy of Austria for the Holy Roman Empire. <P2-S2> The Battle of Leitzersdorf was a battle between the Holy Roman Empire and the Kingdom of Hungary in 1484. <SEP> <P3-S0> The Peace of Olomouc was signed on 2 April 1479 between Matthias Corvinus of Hungary and King Vladislaus II of Bohemia (and Hungary, later), bringing the Bohemian War (1468-1478) to an end. <P3-S1>  On 21 July 1479 the agreement was ratified during the course of festivities in Olomouc. <P3-S2>  This treaty, overall, ratified all terms within the Treaty of Brno developed in March 1478 (with slight modifications made by the King of Hungary on 20 September 1478). <P3-S3>  Based on the terms of the treaty, Vladislaus would cede the territories of Moravia, Silesia, and Lusatia to Corvinus. <P3-S4>  If Matthias perished, then Vladislaus was permitted to redeem these lands for 400,000 florins. <P3-S5>  Moreover, both monarchs would be permitted to utilize the title "King of Bohemia". <P3-S6>  However, only Matthias was required to address the other claimant as the "King of Bohemia".