Sonderkommando
Some Sonderkommandos tried to revolt (fight back) against the Nazis.  For example, in 1944, Sonderkommandos at Auschwitz partly destroyed one of the crematoria used for burning bodies.  For months, young Jewish women had secretly been taking small amounts of gunpowder from a weapons factory in the Auschwitz camp.  They had been sneaking that gunpowder to men and women in the camp's resistance movement.  (The resistance movement was a group of prisoners at Auschwitz who decided to fight back against the Nazis, sometimes in secret ways.)  Using this gunpowder, the leaders of the Sonderkommando planned to blow up the gas chambers and crematoria, and start a rebellion against the camp's guards.