Other poster is probably referring to Operation Valkyrie and Claus von Stauffenberg, but Rommel was also a total dipshit who's "military genius" is total fiction. He overextended in North Africa and everything ran out of fuel. The Germans were forced to leave behind perfectly good tanks in order to survive their retreat. Those were of course captured by the Allies and provided a lot of data, such as answers to the German Tank Problem.

All because dumbass Rommel kept driving around in the desert when he didn't have any oil to do so.