Welcomed by the German nobility in Silesia and the Lusatias, as well as by the Catholic Czechs in Moravia,[2] Matthias acquired these territories for himself and in 1469 pronounced himself Bohemian king in Olomouc.
Emperor Frederick, at the same time stuck in the France–Habsburg rivalry over the Burgundian succession with King Louis XI of France, had initially assisted Matthias against the Hussites in the Bohemian War.
They had few resources that could contend with the Black Army of Hungary, an early standing mercenary force under capable commanders like Stephen V Báthory or Lawrence of Ilok, which conquered most of the Lower Austrian territories.
On 17 November 1487, Duke Albrecht informed Emperor Frederick that, given the present circumstances in his hereditary lands, a compromise with the King of Hungary would be the only rational solution.
[6] However, he could not enforce the Habsburg succession to the Hungarian throne and in 1491 his son King Maximilian I signed the Peace of Pressburg with Vladislaus Jagiellon, who was elected Matthias' successor in Hungary.
During his reign in Hungary, the new Polish king would go on to undo many of Matthias' efforts, unmaking the reformed system of taxation, the standing army, and the centralized authority of the monarch.
The Habsburg archduke Ferdinand of Austria by his marriage with Anne of Bohemia and Hungary claimed the succession, he was enfeoffed with the Bohemian kingdom by his elder brother Emperor Charles V and also reached the consent of the Hungarian magnates.