Now check this experience out:
I have a Japanese friend that I help with his A/c biz from time to time,, and he helps me from time to time.
He lived in Japan as a 12 year old during WWII.
OK Now this:
An German Couple I hang out with at Parker lived in Germany, both were 12 during WWII.
Their common take on war?:
Ya can't occupy a nation without anihilation of the civilian population.
All big conquering armies throughout time have done this.
The Romans, The Vikings, ect ect,,,
You beat the population into a state where they are not going to rise against you.