Crossword clue: a famous battle in 480 bc; a greek army under leonidas was annihilated by the persians who were trying to conquer greece
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
thermopylae
11 letters
wn-def
a famous battle in 480 BC; a Greek army under Leonidas was annihilated by the Persians who were trying to conquer Greece