Was married off toTantalus and had a child. Both were killed shortly after by Agamemnon, the powerful Kind of Mycenae. He is described as ripping the child from its mother's chest and throwing it against the rocks.
Tyndareus did not resent the crime, and Clytaemnestra was married to Agamemnon. After helen's abduction, Agamemnon joined his brother Menelaus and planned to set sail for Troy.
However, Agamemnon was warned that he had offended Artemis, the goddess of the hunt, and that the army could not sail until Artemis was satisfied. He was told he needed to sacrifice his fairest child, his daughter Iphigenia. Agamemnon lured her to the coast with the guise that she was to marry Achilles. He sent her to be sacficed (some stories say artemis spared her and sent her away, others that she died).
After leading Greece to victory in the Trojan War, Agamemnon returned to Mycenae, and was killed by Clytaemnestra for his earlier deed against Iphigenia, whom Clytaemnestra called "her sweet flower." Her lover Aegisthus seized power. Later, both would be killed by Orestes, the son of Agamemnon and Clytaemnestra.
It is said that her ghost, using the Erinyes, spirits that avenged crime, drove her son mad beyond the grave. Apollo, however, stepped in and had Orestes tried in Athens, and once he was acquitted, the Erinyes were obligated to stop haunting him.
http://homepage.mac.com/cparada/GML/Clytaemnestra.html
