Personally, I doubt that I would have any moral issues shooting at other soldiers to kill them. I would have problems however being in a troup with some IQ89 meathead as my leader.
Although it might be a great adventure I doubt that fighting in the front lines would be something I would do willingly. I think that my brain can perform well in stressful situations but I think that I'm not that good at controlling my body in such a scenario. And I'm not a good shooter.
I could fulfill some technical role like maintaining drones, work on machines, or write military software.