<P> In Greek mythology, Chryseis (/ kraɪˈsiːɪs /, Ancient Greek: Χρυσηΐς, translit . Khrysēís, pronounced (khrysɛːís)) was a Trojan woman, the daughter of Chryses . Chryseis, her apparent name in the Iliad, means simply "Chryses' daughter"; later writers give her real name as Astynome (Ἀστυνόμη). </P> <P> In the first book of the Iliad, she has been enslaved, as a war prize, by Agamemnon who admits she is finer than his own wife Clytemnestra and refuses to allow her father, a priest of Apollo, to ransom her . Apollo then sends a plague sweeping through the Greek armies, and Agamemnon is forced to give Chryseis back in order to end it, so Agamemnon sends Odysseus to return Chryseis to her father . Agamemnon compensates himself for this loss by taking Briseis from Achilles, an act that offends Achilles, who refuses to take further part in the Trojan War . A later Greek legend, preserved in Hyginus' Fabulae, states that she had a son by Agamemnon . In medieval literature, Chryseis is developed into the character Cressida . </P>

Who was forced to give agamemnon's prize