On this page you will be able to find the answers for: Ephialtes of Trachis betrayed a Greek army led by the “300 Spartans” when he revealed a strategic flaw to the Persians, resulting in a Greek defeat at which battle? This is a very entertaining trivia question of the day and the correct solution is as follows:
Battle of Thermopylae
Battle of Marathon
Battle of Salamis
Battle of Aegospotami
Battle of Leuctra
The correct answer is Battle of Thermopylae.
The engagement at Thermopylae occurred simultaneously with the Battle of Artemisium: between July and September 480 BC. The second Persian invasion under Xerxes I was a delayed response to the failure of the first Persian invasion, which had been initiated by Darius I and ended in 490 BC by an Athenian-led Greek victory at the Battle of Marathon. By 480 BC, a decade after the Persian defeat at Marathon, Xerxes had amassed a massive land and naval force, and subsequently set out to conquer all of Greece. In response, the Athenian politician and general Themistocles proposed that the allied Greeks block the advance of the Persian army at the pass of Thermopylae while simultaneously blocking the Persian navy at the Straits of Artemisium.