<em>Well, Your best answer would be is </em><em>Greece. </em><em>Because, The Thermopylae is where the mountain pass was near of the sea in the northern </em><em>Greece </em><em>was in site of several battles. </em><em>Good Luck!</em>
I’m pretty sure it’s Greece because that’s where they were told to fight. Thermopylae is in Greece. However, if you disagree- Persia would be a good alternate guess because they were from Persia and went to Greece.