Don't you get worried about being shot at?
Everyone in the military is worried about that, but I'm pretty sure he didn't tell his recruiter he wouldn't enlist unless he was promised not to be shot at. It's always a possibility, but people in uniform know the risks. It's what separates the weak from the willing. Make no mistake about it, troops don't die for their country. They die for their comrades in arms. They serve for their country. There isn't just one reason people serve. It's a good job, it pays fairly well....now, the camaraderie is unmatched, and the honor of serving the country is an honor.
No one goes to war expecting, or wanting, to get shot or "die for their country". Everyone wearing the uniform is worried about that. However, fear isn't the absent of courage. It's the other way around. Fear is what drives us. Fear that evil will prevail. Fear that we'll lose to an evil entity. Fear that your brothers' in arms will be killed.
The price of liberty is, sadly, measured in blood. I wish it weren't so, but there's always some asshole who thinks his life is worth more than yours. The moral compass, however, is on our side.