Napoleon began his conquest of Europe in 1803. After France's victory over Austria and Russia at Austerlitz, in 1806, the French troops seemed unstoppable, so in 1808, the French invaded Spain and Joseph Bonaparte, one of the emperor's brother, was made king. In 1811, the Napoleonic Empire extended from Germany to Spain. France now controlled most of Europe. The invasion of Russia and the revolt in Spain against the king marked the decline of the Napoleonic Empire.