sorry for take this a bit off the topic. don't have any experience with psychology other than i think i a bit on the strange side.
I am kinda curious about PTSD. for US soldiers or those who were not born and raise in conflict nations, do they seem to have more problem with PTSD? what about those who have to live in the area of conflict, do they have some sort of immunity to PTSD? just curious and fascinate.
Short answer (Hey I resemble that re-marc): NO.
Interesting resource in this matter: http://www.ppc.sas.upenn.edu/armyresiliencetraining.htm
Sad thing is that we learned a lot lessons from WWI through the Vietnam war that we kind of put aside when we discovered that we needed more soldiers for combat assignments than we had available.
Children who grew up being exposed to significant violence have their own issues that I would not call "immunity."