[August]

It's also nothing new. The original motorcycle gangs of the 50's were primarily made up of veterans from the 40's. The gangsters of prohibition had more than their share of WW1 vets. Many of the outlaw gangs of our old west were civil war vets. Just about every outlaw group in American history had its share of ex soldiers.

I would venture to say it is similar with european and other nationalities as well.