The challenge is to have the earliest possible invasion or conquest of Arabia from states outside this region, meaning something akin to the Sassanid or Aksumite conquest of Himyar but involving also Hejaz and maybe some of the interior.
I'm particularly interested about an invasion before around 500 BCE, can any of the early iron age or late bronze age empires be in the position to launch such an invasion(s) and what could they get out of it? It doesn't need to happen all at once.
I'm particularly interested about an invasion before around 500 BCE, can any of the early iron age or late bronze age empires be in the position to launch such an invasion(s) and what could they get out of it? It doesn't need to happen all at once.