Did Odysseus leave for Troy to fight in the Trojan war?

Yes, Odysseus left for Troy to fight in the Trojan War, as he was one of the Greek leaders summoned to aid in the conflict. His participation was crucial, as he devised the cunning plan of the Trojan Horse, which ultimately led to the fall of Troy. The war lasted ten years, after which Odysseus faced a long and arduous journey home, depicted in Homer's "Odyssey."