Final answer:
Agamemnon sacrificed his daughter to the gods to stop the unfavorable winds.
Step-by-step explanation:
According to Greek mythology, Agamemnon, the king of Mycenae and the leader of the Greek forces in the Trojan War, faced unfavorable winds that prevented the Greeks from sailing to Troy. In order to appease the gods and stop the winds, Agamemnon sacrificed his daughter, Iphigenia, to the goddess Artemis. This act was seen as a desperate and extreme measure to gain divine favor and ensure the success of their expedition.