 Through a subplot involving the gods and omens, the priest Calchas said the winds would be favorable if Agamemnon sacrificed his daughter Iphigenia to the goddess Artemis.Agamemnon persuaded Clytemnestra to send Iphigenia to him, telling her he was going to marry her to Achilles.When Iphigenia arrived at Aulis, she was sacrificed, the winds turned, and the troops set sail for Troy.