Xerxes' army did include Ethiopians during the invasion of Greece from 480--479B.C. As occupying armies often take advantage of thw women of the occupied terrority--regardless of the ethnicity of the occupiers--it's possible that some Greek women were impregnated by Ethiopians as well as any others who were part of Xerxes vast army.No Greek was "black" as a boy. Stop this silly nonsense.
'Black' Americans need to study and proclaim ancient West African history. Stop being jealous of Greek, Olmec, Maya, Roman, Persian, Hebrew, or anyone elses history and just claim yours (West Africa).
You show so much insecurity in your ancestors' history by trying to follow these jealous freak Afrocentric nutjobs twisting history because they're not very proud of theirs.
This is like someone who hates their face so they create a mask and put it on 24/7, then try to look like someone else because they don't like their original appearance.
But that's a far cry from claiming that the Greeks were Black. And the Persians didn't occupy southern Greece (where Sparta was) before their defeat at Plataea.