for example...
War is Hell
Once at the time of the world war, the Germans were looting all villages, of food, wine and women. Before they could enter one such village, the villagers decide to flee, except for one young man, who had a 90 year old grandmother. So the soldiers found the one occupied house and tore inside.
"Bring us some food."
The young man said " But I have only half a loaf of bread"
"War is Hell, bring us the food" So he gives them the last morsel of food.
"Bring us some wine"
"But I doubt if there is any in the house, you know how things are these days!"
"War is Hell, bring us the wine"
So the young man manages half a bottle and gives it to them.
"Now, bring us a woman"
"But everyone has left the village. The only female present here is my 90 year old grandmother!!"
"War is Hell, bring her to us"
The old woman is brought and she's so frail and weak that the soldiers decide against it and say "We'll let you off this time'"
"But," Granny cries, "War is Hell!!"
link to links for More Military 'Humor' via about.com
also: more recent(?) Iraq jokes/