One of the most fucked up stories I've read about the entire war is when 260,000 Axis forces under General Friedrich Paulus's command were encircled at Stalingrad in late November 1942. The Germans, desperate to survive, resorted to eating corpses and drinking the blood of their dead comrades. 

They had even kidnapped Soviet children and forced them to fetch water from the Volga River. Once the Soviets discovered what was happening, an order was issued to shoot the children to prevent the Germans from getting any water. My mind just freezes trying to process things like this! 🤯