Migration to Abyssinia - Wikipedia
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During the early days of Islam, in 613 AD, a group of Muslims fled to the kingdom of Aksum in order to escape persecution by the Quraysh. The king, Najashi, not only gave them shelter but also rebuked a Quraysh delegation calling for their expulsion back to Mecca. The exiles stayed in Aksumite territory until they returned to Arabia in 622 and 628.
So my question is, would it be possible for the Quraysh to gain the upper hand in their struggle against Muhammad, forcing him to flee to Aksumite territory with as many of his followers as possible in the 620s? Would it be possible for the Muslims, assuming they last as a religious community in the coming decades, to gather an increasingly large following in Aksum, to the point a king or some powerful nobles could convert to Islam? Could a decisive Sassanid victory in their last war against the Byzantines, one that leaves Egypt in their hands, help by permanently severing the link between Aksum and Constantinople?