In the odyssey what do the opening lines reveal about the subject of the poem

tells the story of Odysseus' ten-year struggle to return home to Ithaca after the Trojan War. In Odysseus' absence, his wife Penelope is plagued by suitors, who have been eating Odysseus' food and destroying his estate.

The first twelve lines of the Odyssey that are the invocation suggest that the poem will focus on Odysseus's struggles to return home and the disobedience of his men.

Explanation:

Homer opens the story with an invocation (also known as a praying) to the muses, this invocation foresees many events to happen in his story. The first lines talk about his struggles in battle as we can see in this excerpt "the wanderer, harried for years on end, after he plundered the stronghold on the proud height of Troy"