I could, I think, quite easily have gone to Oxford. I got four good A levels, but my father's income was such that I wouldn't have got a grant, and he wouldn't let me go to university, and that was the end of it.
Every soldier thinks something of the moral aspects of what he is doing. But all war is immoral and if you let that bother you, you're not a good soldier.
You've got to know your limitations. I don't know what your limitations are. I found out what mine were when I was twelve. I found out that there weren't too many limitations, if I did it my way.