No they didn't sign up to fight a particular war. But men and women who choose to enlist in the military do so entirely out of choice and are well educated as to what they're signing up for. These people chose their career as much as I did. There is no compulsion to serve in the military, and if you sign up and have to fight a war you don't believe in, then tough. Maybe I have to do things in my job I don't like, too. I'm unlikely to get killed, but I have chosen a career that doesn't involve a risk of being copped by an IED.