Was the Persian marathon war on sea or land

It arose from a Persian amphibious force which tried to captureAthens and put it under an Athenian tyrant to stop it interferingin the Persian Empire elsewhere. The force landed on the Marathonplain with the Athenian army lurking in the hills waiting forreinforcement from Sparta. When the Athenians saw the Persiancavalry being re-embarked, they dashed down and defeated theinferior Persian infantry. Then they woke up to the fact that thePersian cavalry was being shipped around to Athens to take the cityin their absence, so they ran back over the hills the 26 miles toAthens to protect the city, getting there just as the Persiancavalry was disembarking. The Persians went home.