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What if the bulgarian emperor Simeon I had managed to be crowned as Eastern Roman Emperor?
I can see a way of doing this: have byzantine emperor Alexander III, who was reported an incompetent drunkard, live past the match of polo that IOTL killed him of exhaustion. A civil war for the throne breaks out due to unrest, and Simeon is one of the pretenders, perhaps the strongest in military terms. He prevails, and is crowned in Constantinople. If there's an easier way of giving the crown to Simeon, tell me.
I ask: what are the effects of a bulgarian-byzantine personal union in the 10th century? How long will it last?
With already such a massive empire in his hands, where will Simeon direct his military campaigns to next?
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