<p>novelisto:</p>
<p>I think that if children are born abroad to US citizens, the birth has to be registered with the US embassy so that the child can be properly recognized as a US citizen. A US embassy is US territory.</p>
<p>I met a young man who was born to an American serviceman who was then serving in Iran, and his Vietnam-born wife. He and his wife were advised to return to the US for the birth of their child so that there would be no confusion as to his citizenship.</p>
<p>cross-posted with midmo, whose information is more thorough and accurate. But it is still crucial to register the birth at a US embassy if the child is born abroad.</p>