Darius the Great king of Persia attacks Greece (athens) he wanted control over the Greek city states. The Greek city states revolt and Athens sends the city states troops and goods to help them. This results in succes for some city states. Persia wants revenge on Athens for helping them succeed. So Persia sends 25,000 men across to fight Athens, Athens has time to prepare thanks too pheidippies. Athenians win and Daruis dies of embarressment.