“My fair waters are now filled with corpses, nor can I find any channel by which I may pour myself into the sea for I am choked with dead, and yet you go on mercilessly slaying. I am in despair, therefore, O captain of your host, trouble me no further.”
~ The Iliad - Book XXI (Samuel Butler Translation. p150 / v221)
Achilles goes on a killing rampage. He throws so many corpses into the river Xanthus (Scamander) that it chokes. The river asks Achilles to stop, but he does not. The river fights Achilles and almost drowns him. He prays. Neptune creates a fire and makes the water boil. The river relents. The gods break into a fight. Minerva defeats Mars and Venus. Apollo refuses to fight against Neptune. Trojans flee into the city. Achilles chases after them. Agenor and later Apollo, in disguise, fight Achilles while others go behind the city walls.
In Book 21 of The Iliad, Achilles goes on a rampage and kills so many Trojans that the river is unable to flow due to the sheer number of corpses.