In Greek mythology, Agamemnon was a Greek hero of the Trojan wars, son of Atreus, king of Mycenae, and brother of Menelaus. He married Clytemnestra, and their children included Electra, Iphigenia, and Orestes. He sacrificed Iphigenia in order to secure favourable winds for the Greek expedition against Troy and after a ten years' siege sacked the city, receiving Priam's daughter Cassandra as a prize. On his return home, he and Cassandra were murdered by Clytemnestra and her lover, Aegisthus. His children Orestes and Electra later killed the guilty couple. Research Agamemnon
In Greek mythology, Cassandra was the daughter of Priam, King of Troy. Her prophecies were never believed, because she had rejected the love of the god Apollo. She was murdered with Agamemnon by his wife Clytemnestra, having been awarded as a prize to the Greek hero on his sacking of Troy. Research Cassandra
In Greek mythology, Clytemnestra was the wife of Agamemnon. With the help of her lover Aegisthus, she murdered her husband and his paramour Cassandra on his return from the Trojan War, and was in turn killed by her son Orestes. Research Clytemnestra
In Greek mythology, Iphigenia was a daughter of Agamemnon and Clytemnestra. She was sacrificed by her father at Aulis to secure favourable winds for the Greek fleet in the expedition against Troy, on instructions from the prophetCalchas. According to some accounts, she was saved by the goddess Artemis, and made her priestess. Research Iphigenia