I'm a Mennonite (variety of Christian) so I'm kind of a special case. One of the central tenets of our faith is non-resistance, which means that we take the Bible's commands to turn the other cheek, love your enemies, etc. seriously, meaning that we believe going to war is wrong for a Christian. And because of freedom of religion the government can't send us to war. Historically they usually put drafted Mennonite men (and men from similar faiths) to work at domestic tasks for their term of service, such as working in a hospital, building infrastructure, and many other things. So I wouldn't dodge the draft, but I couldn't go to war.