Don't work for fools. It's not worth it. Getting paid less to work for people you like and believe in is much better for you (and your career) in the long run.
America must always lead on the world stage. If we don't, no one else will. The military that you have joined is, and always will be, the backbone of that leadership. But U.S. military action cannot be the only - or even primary - component of our leadership in every instance. Just because we have the best hammer does not mean that every problem is a nail.
The purpose of a Christian education would not be merely to make men and women pious Christians: a system which aimed too rigidly at this end alone would become only obscurantist. A Christian education must primarily teach people to be able to think in Christian categories.