With the Franco-Bavarian threat to the Habsburg Empire now at its highest pitch, the Duke of Marlborough marches his army into the heart of Europe to save Vienna. In the Iberian Peninsula the war begins in earnest as the arrival of British and Dutch troops opens up the Portuguese front, and in London the Tories over-reach themselves, seal their fall, and ensure that England will act as a central participant in the war, rather than a peripheral one.