This chapter addresses how, for all that March of 1620 was a month of celebration for Frederick V and Elizabeth Stuart, moves were afoot that would soon darken their mood. Although the Bohemian princes had rallied behind their new king, those of the Empire as a whole, Protestant and Catholic alike, met at Mühlhausen and agreed that Frederick should abdicate. Frederick remained adamant that it was his duty to protect both his subjects and the Imperial Constitution from further violations of the 'Letter of Majesty'. What Frederick considered a principled stand was seen by the Emperor as recalcitrance, and four armies were raised against him. How influential Elizabeth's sensitivity to Bohemian mores proved is not clear, but it is clear that she and Frederick gained the love of their subjects. The chapter then considers the signing of the Treaty of Ulm on July 3, 1620, under which both the Catholic League and the Protestant Union agreed to abstain from pursuing military action within the electoral lands of the Empire. While various Protestant armies would be raised in support of the King and Queen of Bohemia, the Union was no longer a coherent entity, let alone a threat to the Emperor or the Spanish. The chapter then details the Battle of White Mountain and the conflicting reports regarding the fate of Elizabeth Stuart and her then unborn child, Maurice.