Basically, how the war began was the persians offered the all the Greeks earth and water oh ho but no the Ionian greeks weren't having that so they began to fight and yeah.
The Athenians saw the persians coming and that is when the battle of Marathon happened. Once the Greeks defeated the Persians and Pheidippides ran to tell the news to the Athenians that they won and when he got there he ran so far that he droped dead.
when the battle of thermopyle was over king leonidas lost to the persians
Then the battle of Salamis happened now the persian ships have points so they got crushed and the greek ships have no points so they don't crush.
The battle of Plateau went on but then sadly the greeks lost and persia won
After the war many citys were burned to the ground and many people were dead sadly :(