Are Homer's masterpieces fact or fiction?
the following site is to learn about the Homer's epic poems, the Illiad and Odyssey
Clearly, Homer's two very famous epic poems cannot be purely factual. At least, we have no reason to believe that there once existed creatures such as the cyclopes or Scylla. Therefore, these are clearly not completely factual.
But we do not know that the two epics are completely fictional either. For example, we do know that there was a war around a city that is most likely the Troy that Homer talks about. But we do not really know that the city is Troy and we have no clue if the war really happened the way the Iliad says it did (although the city was destroyed).
So some parts of these epics are clearly mythical. As to the more realistic stuff (like the Trojan War), the link says
Whether or not this war really occurred, or occurred as the Greeks narrate it, is a relatively unanswerable question.
I would say it is factual, because cyclops do not exist, mermaids neither. I do not know if the battle of Troy does exist, but I'm not sure. Achiles could not have been immortal, and the gods could not have helped Hector or Achilles.