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 how Athens sent troops to support a revolt against Persian rule. This led to battles such as Marathon, where Athens defeated a larger Persian force, and Thermopylae, where Spartan forces held off the Persians before being outflanked. It then discusses how Persia burned Athens in retaliation before being defeated at the naval Battle of Salamis. The wars concluded with a Greek victory over Persia at the Battle of Plataea, ending Persia's attempts to conquer Greece.