6 things about the Trojan War that most movies and media leave out and show that they never read the Iliad or Odyssey.
1) It was not a siege. The concept of a siege didn't exist yet. The Greeks stayed along the shore in camps with their boats.
2) It wasn't just the Trojans versus the Greeks (Achaeans). Troy had many allies that showed up for the war that they numbered just as many warriors as the Greeks (Achaeans). In fact the entire 2nd chapter of the Iliad is about listing all of them. Its probably the most boring chapter. They typically had a huge encampment outside the city walls since the city could not quarter all of them.
3) Achilles isn't even the best fighter/character/person of the Greek (Achaeans) forces. Diomedes is probably the best since he killed just as many dudes, stabbed two gods (without consequences), went on stealth missions out of boredom, and survived the war and became King of Argos and colonized bits of Italy. Achilles is just the most "tragic" hero and so he gets the most fanfare.
4) It takes place not long after Jason of Jason and the Argonauts became king. His kingdom makes regular trips to the Greeks (Achaeans) to trade and keep the war going by offering supplies in exchange for war trophies and spoils (captured horses, armor, weapons, chariots, etc). There are also several literal sons of Hercules fighting in the war too. So the War takes place one generation after Hercules.
5) Helen didn't even want to go with Paris (Alexandros), she was hypnotized by Aphrodite and wanted to return to Menelaus but Aphrodite threatened to make the rest of her life a living hell if she did. Paris (Alexandros) left his nymph wife, Oenone, for Helen. Which makes one wonder why he was so tempted by Aphrodite's offer for the golden apple as it was described to be a loving marriage. I think he was just being an idiot.
6) The Iliad and the Odyssey are just the oldest and most complete versions of the story that we have. The Iliad takes place in the 9th year of the war and the Odyssey takes place in the 10th but there is suppose to be a book/stories in between them (That introduce Memnon, King of Ethiopia that comes to aid the Trojans as well as the Amazons) and several proceeding them. The epic was rewritten in the 6th or 7th century BC (long after Homer) in the epic "The Aethiopis" which is also now lost, but fragments of it has been found (which is why we know about Memnon and the Amazons).