For the longest time, Christians in the military confused me. I always wondered why they would choose military service when one of the 10 commandments is do not murder. Simply put, there is a difference between murder and killing your enemy while in the military. It really comes down to why your country is fighting. There are many examples in the bible where God tell his people to conquer and destroy other nations. How king David came to power. How the Israelites were supposed to get their promised land. etc.