Respect for you bravery/commitment Matt. Some wars are justifiable. There are even institutions and laws from quite some time ago. Geneva Convention, World Court etc to tell you what justifies killing. Patriotism isn't in it.
Don't know much about visas other than what's necessary in my particular case and my better half is smarter than me. The second sentence though resonates perfectly with my simple way of thinking. I would be thinking long and hard about being told to kill people. We could try to imagine scenarios but they would be extreme.