It was the Athenian and Plataian armies, which defeated the inferior Persian infantry caught without its cavalry support.
The plain of Marathon , Greece .
There was no city of Marathon. It was a plain 26 miles north of Athens.
A Persian expeditionary force commanded by the Mede general Datis.
On the Plain of Marathon 26 miles north of Athens.
Not a city - the Plain of Marathon.
The Athenians and their Platian allies defeated the Persians punitive expedition sent against them in a land battle on the Plain of Marathon.
It was not the Greeks, it was Athens and its ally Plataia. The Athenians waited on the edge of the Plain of Marathon for reinforcement from Sparta. Then saw the superior Persian cavalry being embarked on ships and ran down and defeated the unsupported inferior Persian infantry.
The Plain of Marathon was a plain, surrounded by hills where the Athenian infantry lurked to avoid the Persian cavalry. When the cavalry was embarked on ships, the Athenian infantry was able to run down and defeat the inferior Persian infantry, caught without their cavalry support.
Marathon was a plain, not a city. It was owned by Athens. They fought a battle against a Persian amphibious punitive expedition sent by Persia in 490 BCE.
In ancient times, Athens (and other Greek allies) secured one decisive victory over its traditional enemy, Persia, on a coastal plain called Marathon. Occurring in 490 B.C.E., this battle was won by the Greeks against a much larger force and ended a Persian invasion-threat.
Not the Greeks, but the Greek city-states of Athens and Plataea, The battle in 490 BCE was on the plain of Marathon (not a city) 26 miles north of Athens.