It was potentially important as it was designed to precipitate a naval battle which the Greeks hoped they would win and cripple the Persian invasion.
The naval battle was lost by the Greeks, so the Thermopylai stand was of no military importance.
Its importance was that, after the failed naval battle, the Spartan contingent remained holding the pass to let their allies escape before the Persian cavalry broke through and anihilated them - a symbol of noble sacrifice.
For his sacrifice in the battle of Thermopylae.
wood
The Battle of Thermopylae was a defeat for the Greeks and therefore had no major influence on history. It merely held up the Persian advance for a while and provided a romantic image of military bravery for people in the future to look back upon.The Battle of Marathon and the Battle of Salamis were much more important. These were the battles that, unlike Thermopylae, defeated the Persian invasions of Greece and secured the freedom of the Greek city states.Since the Greek city states were the basis of European civilization, historically, it was important they remained free or the entire history of the world from then on would have been quite different!
Ther-mop'-il-eye'
apollo
It was a very temporary holdup in his inexorable march south.
Thermopylae
The narrow coastal pass of Thermopylae . August or September 480 BC
The Phoenicians were not anywhere near the Thermopylae Pass, so they could not betray the Greek force there.
Its blocking of the pass was designed to precipitate a sea battle to defeat the Persian navy. Unfortunately for the Greeks their fleet lost, and the force at the pass was withdrawn.
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including Sparta, was to force a sea battle ,but the Greek lost at sea, and the delaying force at Thermopylae was withdrawn.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.
Leonidas I was the leader of Battle of Thermopylae.
Xerxes I, son of Darius I, was victorius at Thermopylae.
Thermopylai means Hot Gates. In the pass there were thermal springs.