Ground rule #1: Please don't insult our mutual intelligences by saying that the Confederate States were always a part of the United States. It will make you look like an idiot, and I'll have to try to be polite and act like I don't realize it. Thanks.
What I'm trying to get at is, I understand that people born in the South before the War had been native-born US citizens, and most got their citizenship back after the War through specific legal actions (paroles, oaths of allegiance, and such). Babies born after the War were born in the US, so they were native-born citizens. But babies born in that late 1861 - early 1865 period, especially in areas not under US control, were born in the CSA, so they were not native-born US citizens. Was there any law passed after the war to change their status, or did they just sort of become US citizens by default, ie, did everyone just ignore the fact that they weren't US born and they just registered to vote, ran for office, etc, without anything ever being done?
This is a serious question. I am not asking it to make any kind of clever political point. I'd really like to know if there were any legal actions taken concerning these relatively few individuals, or if they just slipped through the cracks.