The document summarizes the Persian Wars between Greece and Persia in the 5th century BC. It describes how Persia conquered Greek colonies in Asia Minor and crushed a revolt in 499 BC, leading Athens to send troops in support. This started the wars. Key battles included Marathon, where Athens defeated the Persians despite being outnumbered; Thermopylae, where 300 Spartans held the pass against the Persians for two days; Salamis, where the Athenians trapped the Persian navy; and Plataea, which ended with a Greek victory and the Persians' final retreat. The Greeks were ultimately successful due to their defensive position, superior soldiers, and use of surprise tactics.