Considering the legacy of Napoleon, he was a tyrant, but he was also dedicated. He conquered most of Europe in the early 19th century. <span>He sold Louisiana in 1803 to the United States for $15 million. In 1805, <span>Napoleon achieved one of his greatest victories at the Battle of Austerlitz, in which his army defeated the Austrians and Russians. </span>But hi</span>s throne came to an end when he tried to invade Russia, which went very badly, in 1812. One might say he achieved a lot while a tyrant, and that is correct.