Answer:
The Trojan War
Step-by-step explanation:
When Helen (who is also Penelope's cousin) is kidnapped, Menelaus reminds all of Helen's past suitors of their oath to support him. Odysseus, however, initially wants to avoid the war. He was told in a prophecy that if he participated in the war, he would not come back home for twenty years. He tries to pretend he is insane in order to get out of it, but his plot is discovered. He ends up having to go, and this is the first time he is called to adventure.