http://en.wikipedia.org/wiki/Battle_of_Smolensk_(1812)
http://en.wikipedia.org/wiki/Battle_of_Valutino
http://en.wikipedia.org/wiki/Battle_of_Tarutino
http://en.wikipedia.org/wiki/Battle_of_Maloyaroslavets
http://en.wikipedia.org/wiki/Battle_of_Vyazma
http://en.wikipedia.org/wiki/Battle_of_Krasnoi
Russians don't fight for defense or capture some location. They have only one goal "kill as many enemies as they can". In all these battles Napoleons army army suffered heavy casualties.