the problem is there's no real evidence it happened in any way that resembled the Iliad (or that it happened at all)
Some kind of war involving ancient Troy did happen (several different wars in fact). What we know of the real ancient Troy from around the time that Homer's tale is most likely to relate:
- Its people were native Anatolians.
- They spoke Luwian (a language which was spoken across a wide area of Anatolia)
- They certainly traded with Mycenaean Greece
- They had relations with the Hittites (and were within the Hittite sphere of influence).
- There was some kind of military conflict with the Hittites (although this was resolved in a peace treaty as the Hittites had diplomatic relations with them after this war).
- It is referenced in Egyptian and Hittite records (the Hittites refer to it as the kingdom of Wilusa) (in fact in the original Homeric Greek it may well have been called Wilion rather than Troy). It (or its people) may also have been referred to as Tursha or Teresh (by Egyptians) or Taruisa (by Hittites) ... or Trojan.
- "Priam" does sound similar to a genuine Luwian word compound that may have been a name -
Priimuua (which means "exceptionally courageous").
- Troy VI was a major trade centre & flourished from c.1800 BC until 1300 BC
- Its walls were brought down by an earthquake in 1300 BC but it was rebuilt. There is little evidence of any siege.
- Troy VIIa that replaced it was more heavily fortified and stood for a century before it too was destroyed around 1180 BC.
- In its heyday Troy VI/VII had a population of around 5000-10000 people
- At some point Mycenaeans did attack the coastal area in that region (precise date unknown). However they were most likely active during the early period of Troy VIIa's history.
- Troy VIIa was actually destroyed in a siege in around 1180BC. However, Mycenaean Greece was in a state of collapse itself from 1250 BC onwards and Troy VIIa outlasted the major Mycenaean cities. It is more likely that Troy VIIa was destroyed by the same wars that accompanied the collapse of the Hittites; so it may have been destroyed by Kaskians, Phrygians or Bryges. (interestingly cultures that later emerged from the Kaskian people would later gain a reputation for being able to cast large statues out of bronze - an eight century example of which supposedly weighed 1.8 tons).
- The ethic peoples who inhabited Troy may have migrated eastwards - as their culture survived these wars and effectively founded the Neo-Hittite Kingdoms of south eastern Anatolian and north western Syria (they used the same language and writing system) that were to flourish from 1160 BC until 900-800 BC when they were absorbed by the Assyrians.