The chemical weapons were first used by the Germans at
Ypres IIRC. Chlorine gas.
This on top of shooting Belgian civilians out of hand, taking all the food, taking the able bodied for labor in Germany...their Austrian friends did similarly in Serbia,
hanging women because their men were partisans.
They were called Huns for a reason. Give me the Empah of Victoria any time.
In comparison they look pretty good, but they were no saints and yes they did set up the first concentration camps in the modern world.