LRRR 
IT IS OK, AT ANY TIME, TO SAY "I CAN'T SUPPORT THIS. I WAS WRONG, AND I AM GOING TO DO THE RIGHT THING GOING FORWARD." THE SECOND-BEST TIME TO BE RIGHT IS NOW.
Nuclear OatmealOoc:
One of the hardest things to do is to learn when and how to say "no". I was in Desert Shield/Storm, and I was gung-ho careerist at the time.
After the dust cleared, I was pretty much of the mindset of hoping there would be another round of "early outs". On the plus side, while my kids have apologized in advance they both let me know there was no way they'd enlist. I told them, "Good. I raised you right then."