I'm not sure if this has already been answered, but...

Homer's Iliad begins with the Greeks sailing to Troy to sack the city and to rescue Helen. The epic ends with the burial of Hektor. The Greek armies have not entered the city at this point.

Homer's Odyssey is the narrative of Odysseus' long journey home after the sack of Troy is over.

It is believed that Homer composed another epic describing the sack of Troy, which would have been the second part of this series (between the Iliad and the Odyssey) but the text did not survive to the present day.

The story of the Trojan Horse is told in other writings, the most well-known being Virgil's Aeneid.

And yes, I am an English major geek...
All that I desire to point out is the general principle that Life imitates Art far more than Art imitates Life.
-Oscar Wilde, The Decay of Living