The Iliad, Book 11

Battle rages.  Greeks, driven by Hate (from Zeus), led by Agamemnon, sweep through Trojans, push close to city walls.  Hektor warned to stay back until Agamemnon gets wounded and leaves battle.  This happens, and Hektor leads the pushback.  greeks picked off and injured one by one, including Diomedes, Odysseus, Aias.  Achilleus sees the injuries, sends Patroklos for a report.  Nestor tells a story of a previous battle, in which he came to the rescue of his friends and won glory doing so.  Begs Patroklos to convince Achilleus to join the battle-- or if not, to himself lead a charge and raise the spirits of the Greeks.  Tragedy unfolding.