Matthias had been staying in Moravia when he was informed that a group of Hungarian prelates and barons had offered the throne to Casimir, a younger son of King Casimir IV of Poland.

The conspiracy had been initiated by Archbishop John Vitéz and his nephew Janus Pannonius, Bishop of Pécs, who oppose war against the Catholic Vladislaus Jagiellon.

Initially, their plan had been supported by the majority of the Estates, but nobody dares to rebel against Matthias, enabling him to return to Hungary without resistance.

Matthias holds a Diet and promises to refrain from levying taxes without the consent of the Estates and to convoke the Diet in each year.

His promises remedy most of the Estates' grievances and almost fifty barons and prelates confirm their loyalty to him on September 21.

The Ottomans have meanwhile seized the Hungarian forts along the river Neretva.

Matthias nominates the wealthy baron Nicholas Újlaki as King of Bosnia in 1471, entrusting the defense of the province to him.

Uzun Hassan, head of the Aq Qoyunlu Turkmens, proposed an anti-Ottoman alliance to Matthias but he refrained from attacking the Ottoman Empire.