Historically accurate
Based on reading the book Napoleon: a life by Andrew Roberts, most of the generals mentioned in the game were real people. Not only were they real but the campaign put them exactly in the place they were in that time, for example Desaix, in the campaign for the imperial eagle he is in the the mission in northern Italy and Egypt and Marengo and then after that he is no longer in the game because he was shot in Marengo. And on top of it the game is really fun and very strategic, with moral, and industrial production etc. Overall I would highly advise you to get this game.
Serge Lannes about
European War 4: Napoleon, v1.4.1