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The Roman-Sassanian War in 602-628 was one of the most pivotal moments in history, with several opportunities for a completely different outcome. As it says on the title, what if the conflict ended with a Persian victory with the Roman Empire reduced to client status or absorbed. There are several ways this could have happened-
610 Heraclius' coup fails and he dies leaving the Byzantines without a competent leader.
615 Khosrow agrees to Heraclius' offer, making a rump Roman client state after cutting huge slices of territory (Heraclius even offered Persia the right to choose the emperor
622 Heraclius' actually goes ahead with his idea of shifting the capital to Carthage
623 Constantinople falls in the siege
Any number of other things like a successful coup during the Persian dominant phase of the war.
So I have a few questions.
Are these Individual PODs enough to have a lasting Persian dominance in the region?
How would both empires develop further and what would the long term situation be?
Can a Persia not bled white by war defeat the Islamic forces?
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