Eris is the Greek goddess of strife, who indirectly initiated the Trojan War.
The goddesses Hera, Athena and Aphrodite had been invited along with the rest of Olympus to the wedding of Peleus and Thetis, who would become the parents of Achilles. Eris was furious because she had been dismissed. She therefore tossed into the party the Apple of Discord, a golden apple "To the Fairest One" – provoking the goddesses to begin quarreling about the appropriate recipient.
Paris, Prince of Troy, chose to award the apple to Aphrodite, who tempted him with the most beautiful woman in the world: Helen, wife of Menelaus of Sparta.
His city was destroyed in the war that ensued.
Greek Mythology Link