Anger be now your song, immortal one, Akhilleus' anger, doomed and ruinous, that caused the Akhaians loss on bitter loss and crowded brave souls into the undergloom, leaving so many dead men--carrion for dogs and birds; and the will of Zeus was done. Begin it when the two men first contending broke with one another-- the Lord Marshal Agamémnon, Atreus' son, and Prince Akhilleus. Among the gods, who brought this quarrel on? The son of Zeus by Lêto. Agamémnon angered him, so he made a burning wind of plague rise in the army: rank and file sickened and died for the ill their chief had done in despising a man of prayer.
The Iliad, Book I, Lines 1-14
Achilles' wrath, to Greece the direful spring Of woes unnumber'd, heavenly goddess, sing! That wrath which hurl'd to Pluto's gloomy reign The souls of mighty chiefs untimely slain; Whose limbs unburied on the naked shore, Devouring dogs and hungry vultures tore. Since great Achilles and Atrides strove, Such was the sovereign doom, and such the will of Jove! Declare, O Muse! in what ill-fated hour Sprung the fierce strife, from what offended power Latona's son a dire contagion spread, And heap'd the camp with mountains of the dead; The king of men his reverent priest defied, And for the king's offence the people died.