Thermopylai means Hot Gates.
In the pass there were thermal springs.
Thermopylae
The Phoenicians were not anywhere near the Thermopylae Pass, so they could not betray the Greek force there.
The narrow coastal pass of Thermopylae . August or September 480 BC
The answer is of how so few could kill so many.
The answer is no Because Thermopylae is a battle not a city.
Leonidas at Thermopylae was created in 1814.
The slowing of the Persian advance at Thermopylae by a force from Greek cities, including Sparta, was to force a sea battle ,but the Greek lost at sea, and the delaying force at Thermopylae was withdrawn. The Greeks won their sea battle at Salamis later on, so Thermopylae had no effect on the outcome of the war. It did, however, become a symbol of staunch resistance.
Holding the pass at Thermopylae was used to force a naval battle. The Greeks lost the naval battle, so it was to no avail or effect.
Xerxes I, son of Darius I, was victorius at Thermopylae.
Leonidas I was the leader of Battle of Thermopylae.
The Battle of Thermopylae occurred , approximately , August or September 480BC .
the battle of Thermopylae took place in August 480 bc