The diary entry summarizes key events in Achilles' backstory based on Greek mythology. It discusses how his mother Thetis dipped him in the river Styx to make him immortal everywhere except his heel. It then outlines Achilles being sent in disguise to the island of Skyros to avoid fighting in the Trojan War. The entry notes that Odysseus was sent to recruit Achilles and persuade him to join the war, which he did with 50 ships and his army. It questions whether Achilles had a falling out with Agamemnon over a woman, which caused him to withdraw from battle for a time and weakened the Greeks.