Peace between the factions was brought about by an agreement that "the Polish king should retain the government of Hungary until Ladislaus attained his majority; that he should be possessed of the throne in case the young prince died without issue; and the compact was sealed by affiancing the two daughters of Elizabeth to the King of Poland and his brother Casimir. {1672} The young Ladislaus was also acknowledged as King of Bohemia; and the administration during his minority vested in two Regents: Mainard, Count of Neuhaus, chosen on the part of the Catholics; and Henry Ptarsko, and after his death George Podiebrad, on that of the Hussites. The death of Uladislaus in the memorable battle of Warna again left Hungary without a ruler; and as Frederic III. persisted in retaining the young Ladislaus and the crown of St. Stephen, the Hungarians entrusted the government to John Corvinus Huniades, the redoubted defender of their country." In 1452, when the Emperor Frederic returned from Italy into Germany, "he found himself involved in a dispute with the Austrians, the Bohemians, and the Hungarians, in respect to the custody of the young Ladislaus. … As Ladislaus had now arrived at the age of thirteen, his subjects, but more particularly the Austrians, grew impatient of the detention of their sovereign at the imperial court. Whilst Podiebrad continued regent of Bohemia, and Huniades of Hungary, the affairs of Austria were directed by Frederic; and the unpopularity of his government caused a general anxiety for a change. But to give up the custody of his ward was contrary to the policy of the Emperor, and in the hope of silencing the Austrians he marched with a force against them. His enemies, however, proved too numerous; he was himself endangered by a siege in Neustadt; and compelled to purchase his deliverance by resigning the person of Ladislaus. The states of Austria, Bohemia, and Hungary then assembled at Vienna; Podiebrad and Huniades were confirmed in their regencies; and the administration of Austria, together with the custody of Ladislaus, was confided to his maternal great-uncle, Ulric, Count of Cilli. The resentment of Frederic does not appear to have been vehement; for in the following year [1453] he raised Austria to an archdutchy, and by a grant of especial privileges placed the Duke of the province on a level with the Electors. After being crowned King of Bohemia at Prague, Ladislaus was invited by his Hungarian subjects to visit that kingdom. But the Count of Cilli, jealous of the power of Huniades, so far worked upon the young king's mind as to create in him suspicions of the regent's integrity. An attempt was made to seize Huniades by enticing him to Vienna; but he eluded the snare, exposed the treachery of Ulric, and prevailed on Ladislaus to visit his people. At Buda, an