What part did Eris play in the Trojan war?

Eris, the goddess of discord, played a pivotal role in sparking the events that led to the Trojan War. She was not invited to the wedding of Peleus and Thetis and, in retaliation, threw a golden Apple inscribed with "To the fairest" among the guests. This act incited a rivalry among the goddesses Hera, Athena, and Aphrodite, ultimately leading to the Judgment of Paris, where Paris chose Aphrodite as the fairest, setting off a chain of events that culminated in the war. Thus, Eris's actions were fundamental in igniting the conflict that resulted in the Trojan War.