Trojan Horse

This article is about the mythological Trojan Horse. For other uses, see Trojan horse (disambiguation).

Detail from The Procession of the Trojan Horse in Troy by Domenico Tiepolo (1773), inspired by Virgil's Aeneid.
The Trojan Horse was a tale from the Trojan War, as told in Virgil's Latin epic poem The Aeneid. The events in this story from the Bronze Age took place after Homer's Iliad, and before Homer's Odyssey. It was the stratagem that allowed the Greeks finally to enter the city of Troy and end the conflict. In the best-known version, after a fruitless 10-year siege of Troy the Greeks built a huge figure of a horse inside which a select force of 30 men hid. The Greeks pretended to sail away, and the Trojans pulled the Horse into their city as a victory trophy. That night the Greek force crept out of the Horse and opened the gates for the rest of the Greek army, which had sailed back under cover of night. The Greek army entered and destroyed the city of Troy, decisively ending the war.
The priest Laocoön guessed the plot and warned the Trojans, in Virgil's famous line "Timeo Danaos et dona ferentes" (I fear Greeks even those bearing gifts)[1], but the god Poseidon sent two sea serpents to strangle him, and his sons Antiphantes and Thymbraeus, before he could be believed. King Priam's daughter Cassandra, the soothsayer of Troy, insisted that the horse would be the downfall of the city and its royal family but she too was ignored, hence their doom and loss of the war.
A "Trojan Horse" has come to mean any trick that causes a target to invite a foe into a securely protected bastion or place, now often associated with "malware" computer programs presented as useful or harmless in order to induce the user to install and run them