Places of battles between Greeks and Persians? Why were the Greeks proud of this battle?

In the 5th century BC, the Greco-Persian wars began, in connection with which Greece had to harrow its own lands from the Persian invaders. One of the greatest victories for Greece was the battle near the city of Marathon. It happened in 490 BC. During the battle, the Persian troops were defeated and driven back into the sea. So the battle became the first major victory of the Greek city-states, which also became proof that even with such a huge state as Persia it is possible to fight and win.