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At its height, the Achaemenid Empire reached from Macedonia to northern India and from the Caucasus Mountains to the Persian Gulf. It derives its name from Achaemenes, who is thought to have lived in the early 7th century BCE. Its greatest rulers were Cyrus II, who established the Persian Empire and from whose reign it is dated; Darius I, who secured the borders from external threats; and Xerxes I, who completed many of Darius’s public works. What event brought an end to the empire? Discuss
Source: The Free Dictionary