Correction .. that would be 2
It goes into why he wasn't drafted, the lottery, etc., but of course he could always have volunteered, and didn't.
Starting with this post #76 and following, including mine and kabar's on the next page of posts over at the link.
Be sure to check out kabar's posts 109 and 111 for further information.
I still say Edwards shouldn't be let off the hook, and should not be allowed to criticize those who enlisted and volunteered, when he didn't lift a finger!