He gradually raised an armed force in north-eastern Bohemia, where the Hussites were strong and where his ancestral Litice Castle was situated.

[3] The struggle of the Hussites against the papal party continued uninterruptedly, and the position of George became a very difficult one when the young king Ladislaus, who was crowned in 1453, expressed his pro-Roman sympathies, though he had recognized the compacts and the ancient privileges of Bohemia.

Even the adherents of the papal party voted for him, some in honour of his moderate policies, some out of deference to popular feeling, which opposed the election of a foreign ruler.

George rejected this demand but endeavoured to curry favour with the Papal See by punishing the more extreme Hussites (Taborites) or members of then newly founded Unitas Fratrum church.

George couched the proposal in Christian terms ("Europe" is not explicitly mentioned) as a way to stop the "abominable Turk", who had conquered Constantinople in 1453.

He sent his brother-in-law Jaroslav Lev of Rožmitál on a tour of European courts with a draft treaty of the message of peace to promote the idea.

All George's endeavours to establish peace with Rome proved ineffectual, but Pius II's plan of a crusade against Bohemia remained unexecuted.

George made enemies among the nobles of the papal party, who assembled at Zelená Hora (Grüneberg) on 28 November 1465 to voice their grievances and conclude an alliance against the king.

Matthias conquered a large part of Moravia, and was crowned by the papal party in the Moravian ecclesiastical metropolis Olomouc as king of Bohemia on 3 May 1469.

[citation needed] His followers chose Vladislaus II, the son of the Polish king, as his successor to continue the fight against Matthias.