What Stick said...
And, I've got four grown ones, two of each type... only one (#1) of which is about to get married fairly late in her life for the first time, and one (#3) about to do so after a really really really long engagement. #2 is so picky she may never do it. #4 is sampling the wares heavily in Santa Cruz, so I hope there are no "accidents".
I tried for about a year to talk to my sons about service, even one stint in a branch of their choice. They would hear absolutely none of it, and actually have such a low opinion of the services that I am quite embarassed about it, honestly. I do not know where they got that, but it's there.
One boy seems genuinely philosophically against warfare, and the other is maybe just too lazy or anti-authority (in which case best does NOT enter
)... but when I spoke of medics and all the other jobs available, that did not seem to change their minds much, if at all. The concept of doing it just to help out your nation did not phase 'em either.
I envy the opportunity you have with your son Willie, and praise you both.