Comment: First of all, I thank and honour you very much for your service.

However , there's the rub.
At 15, they allowed you to forfeit your life.
However, at 15 you cannot drink, you cannot drive, you cannot view a restricted movie, you cannot have sex, you cannot vote
You are not considered adult enough to make decisions on your own. In the armed forces, you respond to orders, disobey them, and you are out if not thrown in jail for treason.

BTW, 15 back then is a whole lot different now
At that time, 15 year old boys held full time jobs, and were not living at home.