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Unfortunately for the Greeks their fleet lost, and the force at the pass was withdrawn.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 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.
Thermopylai means Hot Gates. In the pass there were thermal springs.
the pass is called "The Pass of Thermopylae"
The pass at Thermopylai is still there.
At its narrowest, about 100 metres.
Thermopylae
Sparta
The pass at Thermopylai remains to this day.
There was a pass at Thermopylai (hot gates - a thermal springs area).
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.
The pass of Thermopylae.