Myth in short: (Don't anger the gods) King Agamemnon had killed a deer and boasted he were the better hunter. This of course angered Artemis. When Agamemnon wanted to set sail for Troy for the war, there was no wind after he had arrived at Aulis. A soothsayer told him he had to sacrifice his daughter Iphigehia in order to sooth Artemis, who had blocked the winds. Iphigenia arrives accompanied by her brother Orestes. Once at the altar she is replace by a deer.
