And the sense that it made inevitable an even worse conflict. With civilians the targets of strategic bombing and all the rest. The vengeful allies sought to punish Germany at Versailles, and virtually guaranteed the rise of Hitler or someone like him. A.J.P. Taylor, in his excellent "The Origins of the Second World War," lays it all out. Criticized initially as being "pro-Hitler," Taylor's book is now understood to be seminal.
In WWII the allies crushed German Naziism, Japanese militrism and Italian facism. No such sense of accomplishment followed the end of WWI. The map of Europe was redrawn, some empires were toppled, but not much else. Whereas, despite fifty years of cold war (which the west won), we have only to look to the world community to see the place peaceful prosperous and democratic Germany, Japan and Italy occupy.