[Kenny Bunk]

GG, if a minor child who is an American citizen is adopted into a foreign country, and made a citizen of that country by his parents, that child may still revert to American citizenship upon reaching his majority and choosing to do so.

That has been established by case law. Your American citizenship cannot be taken from a minor child. Upon reaching majority, the child may not choose American citizenship, but has that option.

[little jeremiah]

Sven Magnussen differs and has shown sources that support his contention.