The Celts in our timeline had spread as far as Galatia in Anatolia. What if they went further then Anatolia like Persia, North Africa, Arabia, and/or the Asian steppes, maybe further?
How could they affect the cultures and peoples of their new neighbors? Could we see modern Celto-Africans, Celto-Arabs, Celto-Irans, Celto-Asians ect.