Infamously the King of Hungary accepted the bribe, and raising a powerful army, invaded Bohemia, to wrest the crown from his father-in-law.

His armies were pressing on so victoriously, in conjunction with those of Frederic, that the emperor was now alarmed lest Matthias, uniting the crowns of Hungary and Bohemia, should become too powerful.

He therefore not only abandoned him, but stirred up an insurrection among the Hungarian nobles, which compelled Matthias to abandon Bohemia and return home.
Matthias, having quelled the insurrection, was so enraged with the emperor, that he declared war against him, and immediately invaded Austria.

The emperor was now so distrusted that he could not find a single ally.

Austria alone, was no match for Hungary.