Excerpts from Books and Wikipedia
"At least one of his plays was influenced by the Persians' second invasion of Greece (480–479 BC). This work, The Persians, is the only surviving classical Greek tragedy concerned with contemporary events (very few of that kind were ever written), and a useful source of information about its period. The significance of war in Ancient Greek culture was so great that Aeschylus' epitaph commemorates his participation in the Greek victory at Marathon while making no mention of his success as a playwright." [Wikipedia]