Well said vietvet'67. Living in the boonies of Vietnam taught me a number of things:

1. Your enemy is anyone that looks like one and should be treated
    accordingly until proven otherwise. Unfortunately this scenario
    includes women and children. You have to be aware of ALL the
    people ALL around you ALL the time. And these traits stay with
    you forever.
2. Indoctrination is a powerful tool. The life that these people
    live is all that they know. Their countrie's enemies are   
    their enemies and all is fair in war whether they are in uniform
    or not.
3. Your enemy does not live in accord with the Geneva Convention.
    Believe it, they do not share your morality.
4. You have to be totally aware of your surroundings. As vietvet'67
    stated, tunnel vision has no place on the battlefield. To this
    day I DO NOT walk through a door without looking carefully at
    what might be on the other side and I always (ALWAYS) look for
    a way out of any room or building that I enter. I won't elaborate
    but this practice saved my ass on one occasion.

This list is endless...