“Years ago the military used to advise military wives to return home to give birth if they wanted to preserve natural born status.”
No information to back that up.
“Only embassies are US soil, military bases are not, except those on US territory, “
Not true. After over 20-yrs service, most of it overseas, US bases are US territory.
I've heard several vet FReepers (who I assume were/are elderly) say that's what they were told.
(Sorry, I can't remember their handles, so I can't ping them to verify.)
Things change. more often from neglect than by legislation. Anchor babies come to mind.