Soon, Napoleon's continuing machinations in Italy, including the annexation of Genoa and Parma, led once again to war in 1805—the War of the Third Coalition, in which Austria, Britain, Russia, and Sweden took on Napoleon. The Austrian forces began the war by invading Bavaria, a key French ally in Germany, but were soon outmaneuvered and forced to surrender by Napoleon at Ulm, before the main Austro-Russian force was defeated at Austerlitz on 2 December. Napoleon entered Vienna itself, as much a celebrity as conqueror. By the Treaty of Pressburg, Austria was forced to give up large amounts of territory—Dalmatia to France, Venetia to Napoleon's Kingdom of Italy, the Tyrol to Bavaria, and Austria's various Swabian territories to Baden and Württemberg, although Salzburg, formerly held by Francis's younger brother, the previous Grand Duke of Tuscany, was annexed by Austria as compensation.