And so, 70 years ago this November – on November 19 to be precise – the million-soldier reserve of the Red Army was transferred to General Nikolai Vatutin’s Southwestern Front, Marshal Konstantin Rokossovsky’s Don Front, and Marshal Andrei Yeremenko’s Stalingrad Front. They went on to spring the trap of Operation Uranus, the code name for the planned encirclement and annihilation of the German Sixth Army and Fourth Panzer Army.