Eastern Front of WWII.
The Soviets were better than the Nazis, but that's probably the only good thing you can say about them.
There were no virgin nuns in a monastery in the western allies too. France and UK were still colonial empires in the 1930s. There was the great famine in India. But of course, the Axis was worse than all of them.
In the WW2, we can say that one side had moral superiority. But in the WW1, there were only imperialist powers against imperialist powers. We can say that it was an example of evil vs evil