I believe the answer is smallpox, but I could be mistaken. There were lots of viruses threatening the population at the time but from what I know, smallpox was the largest threat.
Answer:
He made a <u><em>terrible</em></u> decision.
Explanation:
By splitting the empire in two, the Barbarians easily collapsed Rome, which lead to the death of the Roman Empire. It also led to the rise of the Byzantine Empire and the Frankish Empire. Over all, it was a terrible decision that changed European, perhaps even world history entirely.
Won control of all northern India and much of central India. The Safavid empire strengths: They were rich on trade because of location, Iranian art flourished and strong military?