What are the internal or external conflicts of The Odyssey?

There are MANY conflicts Percy encounters throughout the five novels. To sum it up, some of his biggest internal conflicts are the prophecy (having to make a decision at 16), resisting Kronos' temptation, his fatal flaw of loyalty, his rocky relationship with the gods, ect. External conflicts include just about every monster fight, every physical encounter with an enemy, and mostly the idea of Percy vs. Luke/Kronos on the battle ground.