What is the summary of Iliad, Chapter 4?

On Mount Olympus, the gods argue over the outcome of the duel. Zeus declares that Menelaos has won, so the war should end as promised. The goddesses Hera and Athena disagree. Hera hates Troy and wants to see it completely destroyed after all her work to help the cause of the Greeks and retrieve Helen. Zeus doesn't mind this, but wants to seem reluctant so he can extract a promise from Hera. He tells Hera she can do what she wants to Troy, but she also has to promise not to protest if he ever wants to destroy a city that holds men who are dear to her. She agrees, unsuspecting, and Zeus sends Athena to stir up the men to battle again.

Athena disguises herself as a soldier and appears to a Trojan named Pandaros, telling him he will win great glory among the Trojans if he takes advantage of the truce to strike Menelaos down with an arrow, while he's not expecting it. Convinced, Pandaros shoots an arrow, but Athena only permits it to graze Menelaos, since she doesn't really want him killed. The action brings the response she hopes for, however, since Agamemnon is angered when he sees that the truce has been broken. He prepares his troops for battle, and ignites their passion for fighting, confident the gods are on his side.

When the battle begins, Apollo helps the Trojans while Athena helps the Greeks. The truce is over, and the fighting is fierce. Before the day ends, many men on both sides end up sprawled face down, dead in the dust of the battlefield.