@besserwisser @druid @matrix > Romans also took auxilaries from areas out of their control, so it wouldn't be out of the ordinary to employ, say, Ethiopians.
There are indeed records of some Ethiopian soldiers. It is mentioned in the Historia Augusta.
But no auxillia were levied from ethopia. More likely these were normal citizen soldiers in the roman tradition.
> You can't equate today's population to back then, a lot has changed due to migration and such
Genetic testing shows that ancient NA peoples were more similar to those of the levant than the peoples of the modern day are. Consider Egypt:
>What they found was very interesting. Over the 1,300-year period that the mummies represented, the researchers found that there was no real shift in genetics, suggesting that despite successive invasions and influxes of foreign people from all over Europe, the Middle East, and Africa, the population genetics stayed surprisingly stable.
>When they then looked at how the genetics of the region have changed between then and modern day, they found some significant differences. It turns out that modern Egyptians share more genetic ancestry with Sub-Saharan Africans than ancient Egyptians did, while the ancient Egyptians show a closer genetic affinity with ancient people from the Near East and the Levant.
https://www.iflscience.com/editors-blog/genetic-study-reveals-the-surprising-ancestry-of-ancient-egyptians/The idea that north africans look like subsaharan africans is probably based on stories of moorish pirates, which are a thousand years older at least than Roman control of Britain.
Also iirc this was set in Roman Britain, and that actually would have been plausible; after the Massacre of Teutoburg Forest, the Roman Empire instituted a policy of always sending auxiliaries (conquered people as soldiers) to provinces completely unlike their home one so that it would be harder for them to foster rebellions and garner local support. By the Roman withdrawal from Britain, most of the soldiers on the Wall were from "Syria" (which was a huge province whose size and borders bear no relation to the modern state of the same name.)
This amusingly has left us with a fair bit of desperate correspondence preserved in the peat of Vindolanda. My favourite, from a Syrian soldier, reads: "By the gods, this is an awful place. Send blankets! Send clothes! Lest we freeze!"