Troilus and Cressida is a Shakespearean tragedy about the affair between the Trojans Troilus and Cressida during the Trojan War. Shortly after the Troilus and Cressida consummate their love, Cressida is traded to the Greeks for the return of a Trojan prisoner. After a fight between Ajax and Hector results in a draw and temporary truce, Troilus finds Cressida has agreed to become the Greek Diomedes' lover. Enraged, he and Hector wage battle, killing Achilles' companion, Patroklos. Achilles then avenges his death, killing Hector.