Kurt Reuber was a doctor in the German army at Stalingrad. He was also a protestant minister. In December 1942 on the back of a Russian map, he sketched a picture of the baby Jesus being held by his mother. On the left of the picture the German translates as "1942 - Christmas in the cauldron". In smaller letters at the bottom "Festung Stalingrad" - "Fortress Stalingrad". And on the right, "Light, life and love".
At the time the German army was surrounded and faced annihilation.
Reuber hung the sketch in his bunker. He commented that when his unit came to his bunker for a Christmas celebration everyone was spellbound by the drawing.
You can read more about this amazing work on Wiki