To be clear (so that this is not removed for being a "popular" question about the Trojan War) I am asking specifically about the legend of the Trojan horse. While I am sure you are all already familiar with it, the story goes that the Greeks constructed a gigantic wooden horse and hid soldiers inside of it. The Greeks then left the horse by the gates of Troy and pretended to sail away. The Trojans took the horse inside their gates, assuming it to be a gift. The Greek soldiers inside the horse snuck out at some point in the night and opened the gate for the rest of the Greek army to invade Troy. While I realize the primary source for the legend is the Aeneid of Virgil, an epic poem, perhaps there are other sources which unveil more information that I am not aware of.
I don't think the mods remove "popular questions"; just some friendly redditor comes by and points you to the FAQ, like I am right now.
I'm doing this because you are asking a variant of a question that is covered, i.e. what do we know about the Trojan War? I think the subreddit also always encourages additional responses in these cases.
I do want to make an amendment to your question though. The Trojan Horse is mentioned in the Odyssey. Helen, when Telemachus visits her in Sparta, recalls walking around the horse (she knows the surprise somehow) and tries to mimic the voices of the wives of the men she knows are inside, to get them to reveal themselves. It's a very strange thing for Helen to do, because in the same conversation she talks about helping Odysseus steal the palladium. She looks like she's working for both sides.
I think given the strange things going on around the horse in Homer and the state of our knowledge of the Trojan War, it's a good bet that there's more literary stuff going on here than historical stuff.