 This victory restored Rudolph's self-confidence, and he decided to introduce severe Counter-Reformation measures in Silesia and Hungary, outraging his Protestant subjects.The Calvinist magnate István Bocskai rose up against Rudolph, and most Hungarian noblemen joined him before the end of 1604.Taking advantage of his relatives' anxiety, Matthias persuaded Ferdinand, Maximilian and Ferdinand's brother, Maximilian Ernest, to start new negotiations concerning Rudolph's succession.