Apart from possibly the Mauryan, Macedonian and Mongol Empires, which non-Muslim power was capable of ruling / conquering much of Persia and India?
Not sure about plausible it is though at maximum am looking for a scenario where an Indo-Persian Empire is formed, whose territory is composed of much of the Indian subcontinent up to the East bank of the Tigris River.
Not sure about plausible it is though at maximum am looking for a scenario where an Indo-Persian Empire is formed, whose territory is composed of much of the Indian subcontinent up to the East bank of the Tigris River.