The Athenian army won the Battle of Marathon, defeating a the larger army of Persian invaders. Fought in 490 B.C., this battle marked the end of the first Persian attempt to conquer Greece.
Historians estimate that the Athenian army assembled on the Marathon plain included 10,000 soldiers from Athens and the small city of Plataea, while the Persian army numbered around 25,000 soldiers. The Athenian commander Miltiades strengthened his wings while weakening his center, a formation that allowed his army to attack the lesser trained Persian flanks with greater force. This threw the Persian army into confusion, allowing the Athenian forces to win the day. After marching back to Athens, the Athenian army prevented the Persians from landing there, and the Persians went back to Asia.