 Complete the following phrase:  Emperor Matthias died on 20 March 1619. Maximilian of Bavaria encouraged Ferdid to adopt an aggressive policy against the Bohemian rebels, but Ferdid again confirmed the Letter of Majesty and urged the Bohemians to send delegates to Vienna. The directors ignored Ferdids acts and made further preparations for an armed conflict. Wallenstein stormed into Olomouc and seized 96,000 talers from the Moravian treasury on 30 April. He gave the booty to Ferdid, but the king returned it to the Moravian Estates. The Protestant Estates of Upper Austria demanded the confirmation of their religious and political liberties before recognizing Ferdid as Matthias successor. Thurn and his 15,000 troops laid siege to Vienna on 5 June. Since only 300 soldiers were staying in the town, Ferdid sent envoys to his commander at Krems, Henri Dampierre and entered into negotiations with the Upper Austrian Protestants about their demands. Dampierre and his troops reached Vienna by boat and forced the Protestant delegates to flee from the Hofburg. After Ferdids general, Count Bucquoy, defeated the Bohemian rebels in the 