Ruler of what? Ask an answerable question if you want an answer.
The war went on for fifty years. The one at its most intense was Xerxer I.
Darius I .
Saddam was the ruler of Iraq during the Iran-Iraq War 1980-1988.
The question is confused. The first king of the Persian empire was Cyrus. The king during the punitive expedition against Athens and Eretria in 490 BCE was Darius. The king during the invasion of Greece 480-479 BCE was Xerxes.
Xerxes I.
First identify what the First Persian War was.
there was the first Persian war then the second Persian war then the war that we are in today.
Xerxes I.
When was the 'First' Persian War.
Persian War 499-449 BCE. Peloponnesian War 431-404 BCE.
For the first phase King Darius I. After his death, it was his successor King Xerxes.
Persian War I, Persian War II, The Peloponnesean War, The Macedonian War, …
First define the First Persian War. The Persian War ran 499-449 BCE - it had several pheses - Ionian Revolt, Persian punitive expedition against Eretria and Athens, Persian invasion of mainland Greece, Greek counter-offensive. Which among this is supposed to be 'First Persian War?