The Iliad covers Greek culture
the arts
a disagreement between brothers
the Trojan war

Yes it does contain the story of the Trojan horse

Explanation: Free horse!” and wheel it into the city. By night, the Greek army sneaks out of the hollow horse and takes over Troy. But, surprisingly, you won't find any of that in the Iliad, Homer's great epic poem about the war for Troy! ... Homer, obviously, saw Hector's death, not the horse, as the turning point of the war.