Wikipedia has this to say on how many people died because of Napolean's wars:

"Civilian deaths are impossible to accurately estimate. While military deaths are invariably put at between 2.5 million and 3.5 million, civilian death tolls vary from 750,000 to 3 million. Thus estimates of total dead, both military and civilian, range from 3,250,000 to 6,500,000."

It's a funny thing. If a man kills ten people, he's a perverted serial killer, but if he kills thousands, he's a great leader.