The Russian expedition actually cost France less than fifty thousand men; the Russian army in its retreat from Vílna to Moscow lost in the various battles four times more men than the French army; the burning of Moscow cost the lives of a hundred thousand Russians who died of cold and want in the woods; finally, in its march from Moscow to the Oder the Russian army also suffered from the severity of the season; so that by the time it reached Vílna it numbered only fifty thousand, and at Kálisch less than eighteen thousand.”