<P> The Trojan Horse is a tale from the Trojan War about the subterfuge that the Greeks used to enter the independent city of Troy and win the war . In the canonical version, after a fruitless 10 - year siege, the Greeks constructed a huge wooden horse, and hid a select force of men inside . 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 Greeks entered and destroyed the city of Troy, ending the war . </P> <P> Metaphorically a "Trojan Horse" has come to mean any trick or stratagem that causes a target to invite a foe into a securely protected bastion or place . A malicious computer program which tricks users into willingly running it is also called a "Trojan horse" or simply a "Trojan". </P>

Who built the wooden horse in the trojan war