ok, i can agree with what some of you are saying, like a mandatory 2-year service thing, but not drafting into the military. If the U.S. was to try to force me to go to Iraq or some other god awful region that we don't need to be in anyway...screw that. Canada here I come. I'm a pacifist.
Then you can be an unarmed corpsman - perfect pacifist duty.
There's a guy from the Flint area who was a pararescue guy in the Vietnam war. He would be lowered into hostile territory, locate and retrieve downed / wounded aviators, pilots, and aircrew. Once they were aboard the chopper and safe, he would get back in. Didn't carry a weapon. Probably one of the baddest ass people I've ever heard of, and a pacifist.
You go where you're needed - again, it's not about YOU, but about the greater good. It has nothing to do with whether you agree with the big picture or not. I'd bet the 1000s of troops who died at Iwo Jima would rather have been somewhere else. Hell, I bet a lot of them were prepared to cede Asia to the Japanese if it would've got them outta there. But they didn't, they stepped up and did their duty - not their personal preference, but their duty.