Wooden Horse of Troy
Virgil tells us that Ulysses had a monster wooden horse made after the death of Hector, and gave out that it was an offering to the gods to secure a prosperous voyage back to Greece. The Trojans dragged the horse within their city, but it was full of Grecian soldiers, who at night stole out of their place of concealment, slew the Trojan guards, opened the city gates, and set fire to Troy. Menelaos was one of the Greeks shut up in it. It was made by Epeios (Latin, Epeus).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Wooden Horse of Troy from Fact Monster: