RE: Russia probably did more to defeat Germany during WWII than any other one nation.
Climate Change was on Russia’s side, both against Hitler and Napoleon.
By the time the US entered the war, Russia was legendary for being the place where German soldiers knew that they would not be allowed to live as hostages. They would be killed and in very painful ways. In fairness to Russia, Russia did in many ways drain the energy of the German military. Hitler made the same mistakes, but Russia took one of the biggest hits of WWII. If not the biggest hit.