When Odysseus and his crew arrived at the cyclops's island, they got into some trouble. Odysseus lost some of his men, and due to his cockiness and pride, the cyclops Polyphemus asked his father, the god of the sea, to curse him.
The Cattle of The Sun God
Sirens are creatures that sing to their victims to try to drag them in to eat them. When Odysseus and his crew pass the sirens they all fill their ears with wax, except Odysseus who is only tied up. This shows Odysseus's curiosity because unlike the rest of the crew who were playing it safe, he didnt coveer his ears.
Scylla and Charybdis
Odysseus and his crew land on an island with people known as lotus eaters. The men in his crew who decided to eat the lotus lost their drive to get back to Ithaca, and instead stayed on the island forever, always eating lotus.
Odysseus and his crew begin to run low on food, and they are all extremely hungry. They have some cattle that is sacred to Helios, the god of the sun. Odysseus warns his men not to eat the cattle, however their hunger was too much for them to ignore and they ate cattle. This lead to Zeus, Helios's father, to throe down a lightning bolt on Odysseus's ship.
While sailing back home, another problem Odysseus and the crew run into are Scylla and Charybdis. Odysseus must make a decision: to sail towards Scylla and lose 6 of his men, or sail towards Charybdis, a whirlpool that will put his whole ship at risk. He decides to sail closer to Scylla, and lose 6 of his best men.
When Odysseus returns to Ithaca, he learns of the men harassing his wife, wanting to marry her so they can be king. Obviously, Odysseus was not a fan of this. He, his son, and a few of the men who stayed loyal to him killed all the suitors.