Grand total of Napoleonic wars are still poorly developed in our historiography, probably, because of influence at various times the ideological and political moments. We didn’t know exactly the number of our armies, human and material losses in war of 1812, as well as that our society and state received as a result of a victory, as well as in what direction they developed after this great disaster. And these fundamental questions, giving a chance to estimate value and consequences of wars of an era of 1812 for history of Russia are investigated in this article.