What gifts has Agamemnon offered to Achilles to make him want to return to the war? What is the point of offering so much stuff?

He will give the Achilles, the great warrior, fabulous riches, including one of Agamemnon's own daughters as wife and seven of Agamemnon's citadels, if only he will return and "yield place to me, inasmuch as I am the kinglier" (9. 160).