Where and when.
At the Pass of Thermopylai a Greek force led by a Spartan king delayed the Persian army for three days.
The Spartan King Leonidas.
The leader of the Greek army was Agamemnon.
Eurybiades, Spartan admiral and commander of the defending Greek fleet.
A force from several Greek cities numbering about 7,000 led by the Spartan king Leonidas.
The Spartan Government was led by Thomas Pryorious.
After defeating the doomed Spartan/Greek rear guard led by the Spartan king Leonidas at the narrow pass of Thermopylae the Persians went on to raid the Greek countryside and burned the Greek City-State of Athens . Afterwards , the Persians returned home .
The battle of Thermopylae was fought between Greek mainland cities led by Sparta and a Persian invading army. If you have ever seen the movie 300 that's what it is. But there were also about 5,000 non-Spartan troops with the Spartans.
A small army of contingents from Greek cities led by Sparta withdrew when its mission of blocking the Thermopylai Pass was completed. The Spartan and Thespian contingents remained behind, sacrificing themselves to cover the withdrawal of the others.
A small force from Greek city-states led by Spartan King Leonidas fought the Persians .
Alexander the Great as hegemon of a united Greek army.
Answer: The Greek king who led the army against Troy was Agamemnon, the King of Mycenae. The greatest though Greek king to ever have lived was Alexander the Great. Hope this helps.