The Battle of Thermopylae

Xerxes is seated high atop things in Athens he's sort of happy I guess he kind of got what he wanted he wanted Athens to burn that was his objective it's almost like he made a deal with the devil of war to get what he wanted. He should have wanted the Athenians to be ultimately and finally defeated and he didn't plan well enough for that so what do you remember about how the decisive naval battle the the moment that would determine the fate of Greece and Persia?