Why was Odysseus called away from home?

Odysseus was called away from home to fight in the Trojan War, a conflict sparked by the abduction of Helen, the wife of Menelaus, King of Sparta. As a cunning leader and hero, he was compelled to join the Greek forces due to his oath to protect Helen’s marriage. This journey ultimately led to his long and perilous voyage home, which is the central focus of Homer's "Odyssey."