The Iliad, Book 4

Zeus makes fun of Hera and Athene because, with the war ended, the Trojans won't be slaughtered after all.  Athene goes down to start the conflict up again-- appears as Laodokos, convinces the Trojan Pandaros to strike a blow and take a shot at Menelaos-- then keeps the arrow from killing him.  Everybody's pissed.  Full war back on.