- In the beginning of Book 20, Zeus gives permission to all the gods to help either side each wishes. Apollo pretends to be one of Priam's sons, Lycaon, and goes to Aeneas and tells him to fight against Achilles. Aeneas realizes he would be overmatched but fights anyway. As Achilles goes in for the kill, Poseidon rescues Aeneas and makes him disappear.