Why was Odysseus sent on his journey?

Odysseus was sent on his journey primarily due to the aftermath of the Trojan War, where he played a crucial role in the Greek victory. His journey home to Ithaca was delayed by various challenges and divine interventions, particularly from Poseidon, who was angered by Odysseus's actions during the war. Additionally, the journey serves as a narrative framework for exploring themes of perseverance, cunning, and the struggle for identity and homecoming. Ultimately, it highlights Odysseus's character as a hero facing both external and internal obstacles.