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Which royal titles did Xerxes I stop using after the Babylonian revolt?
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Following the revolt of Babylon, Xerxes I abandoned the titles of king of Babylonia and king of Egypt.1
Previously, these regions had been treated as kingdoms personally united to the Achaemenid Empire, but Xerxes rejected this fiction of personal union in favor of a more centralized approach. After the suppression of the Babylonian revolt, he adopted the singular title of king of the Persians and the Medes.1