Our understanding of the meaning of "natural born citizen" derives from only two possible sources.
It either emerges from English Common Law, (Jus Soli) or it descends from Emmerich Vattel's "Law of Nations." (Jus Sanguinus)
In English Law, a statute was enacted granting Subject status to the children of English fathers born abroad.
Vattel's "Droit des Gens" explicitly states that the children of soldiers are always citizens regardless of where they are born.
So whether we go with English Law, or Vattel, the result is the same. Children born to soldiers in foreign lands are always subjects or citizens, as the case may be.
Thomas v. Lynch - 5th Circuit - August 7, 2015 - 14-60297
And I have very little faith in Supreme court decisions ever being correct, and the closer they are to the present time, the greater likelihood that they are in error.