Alexander the great conquered it. Upon his death, it eventually went to one of his generals. Then it was conquered by Rome, by the Mongols, and by Muslim armies. It is now called Iran.
Persian Revolt happened in -552.
Persian Campaign happened in 1914-12.
Battle of the Persian Border happened in -551.
Anglo-Persian War happened in 1856.
Persian-Uzbek Wars happened in 1510.
Greco-Persian Wars happened in -449.
Persian Constitutional Revolution happened in 1905.
Persian Gulf Inferno happened in 1989.
Persian king Cambyses brought Egypt into the Persian Empire.
The Persian Wars lasted from 499-448 BC. The Pelopenesian Wars lasted from 431-404 BC So the answer is: The Persian Wars happened first.
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Second Persian invasion of Greece happened in -480.