In Chapter 11 of The Trojan War, Barry Strauss looks at the evidence for the destruction of Troy by the Greeks.
Although most scholars doubt the existence of the Trojan Horse, Strauss shows that the story of the Greek destruction of Troy doesn't rest on the literal existence of a Trojan Horse. Odysseus had already sneaked into Troy a couple of times and had help. What with dissatisfaction of the residents, a few carefully placed spies/traitors, a few blows to the head of Trojan guards and a well-timed attack on the city, the Greeks could have surprised the Trojans in their drunken revelry. Strauss says that evidence from an archaeological settlement now called Troy VIi (formerly Troy VIIa), shows that Troy suffered destruction via fire probably between 1210 and 1180 B.C., the time period in which the Trojan War, if it did occur, is thought to have taken place.
The Trojan War: A New History, summary pages:
Introduction | 1. War for Helen | 2. The Black Ships Sail | 3. Operation Beachhead | 4. Assault on the Walls | 5. The Dirty War | 6. An Army in Trouble | 7. The Killing Fields | 8. Night Moves | 9. Hector's Charge | 10. Achilles Heel | 11. The Night of the Horse | Conclusion