Was Achilles a real story?

Could you please elaborate on whether the tale of Achilles, the legendary Greek warrior from the Trojan War, is based on a real historical figure or purely a work of fiction? Was there any evidence or archaeological discoveries that suggest Achilles was more than just a character in ancient mythology? It's fascinating to consider the blurred lines between fact and fiction in ancient history, and I'm curious to hear your thoughts on the authenticity of Achilles' story.