On this day, 7 October 1944, an armed rebellion broke out in the Auschwitz concentration camp. Resistance members in the camp found out the Sonderkommando (the Jewish prisoners tasked with working in the crematoria and disposing of bodies) were due to be murdered on that day. So the group fought back with knives and improvised weapons, like handmade grenades made from smuggled gunpowder in sardine cans. They burned down Crematorium IV, killed three SS officers, even cremating one, and injured others.
Pictured is a photograph from Auschwitz which was taken and smuggled out by the resistance https://www.facebook.com/workingclasshistory/photos/a.1819457841572691/2102700493248423/?type=3