The most decisive battle for Greek history

[Gnaeus Pompeius Magnus]

I choose to go with salamais for the reason that it broke the persian navy and forced a land battle at marathon, which if memory serves is approximatly 26.7 miles from Athens. Even though it was a defeat the battle of Thermopolye was the battle that saved greece in the view that without the holding of the field by the spartans for seven days the armies of greece would not have had time to mobilize, if that is the correct word, or summon an army to defeat the persians at marathon. Thermopolye is one of four battles that saved western civilization along with marathon, siege of vienna, battle of pottiers. <p></p><i></i>