First invasion of Greece (492–490 BCE)
Battle of Marathon
- Main article: Battle of Marathon
The battle, fought on the Marathon Beach, was the culmination of the first attempt by King Darius I of Persia in his attempts to subjugate Greece.
After the battle was won by the Greek armies, the Athenians dedicated a treasury in the Sanctuary of Delphi to the Greek god Apollo to commemorate their victory. In addition, a group of statues was also erected in the sanctuary, located near the southeastern entrance.
Second invasion of Greece (480–479 BCE)
Battle of Thermopylae
- Main article: Battle of Thermopylae
Following Darius I of Persia's defeat during the Persian's first invasion at the Battle of Marathon in 490 BCE, Darius' son and successor, Xerxes I actively began planning a second attempt, backed by the Cult of Kosmos, who previously supported Darius. Upon ascending to the throne, he spent the next several years building up his military and naval forces in preperation. Finally, in 480 BCE the Persian emperor considered himself ready and crossed the Hellespont and invaded Greece. 
They quickly overran Makedonia and Malis and had made it as far as the Hot Gates of Thermopylae before encountering significant resistance. This resistance took the form of a united Greek army under the command of King Leonidas I of Sparta. 
After a long battle, the Greek and Spartan armies were gaining the upper-hand after forcing the Persians to fight in a narrow pass. Until the sudden betrayal of one of their own, who showed the Persians a way around the pass. The Persians then quickly overran the Spartan forces and killed them all.
Battle of Salamis
- Main article: Battle of Salamis
Battle of Plataia
- Main article: Battle of Plataia
In 479 BCE, the Persian army and the allied Greek poleis fought their last land battle at Plataia. The battle marked a tremendous victory for the Greeks and effectively ended the Persian invasion of the country.