According to legend, in return for awarding her a golden apple inscribed "to the fairest," Aphrodite promised Paris the most beautiful woman in all the world. After concluding a diplomatic mission to Sparta during the latter part of which Menelaus was absent to attend the funeral of his maternal grandfather Catreus in Crete, Paris ran off to Troy with Helen despite his brother Hector's prohibition. Invoking the oath of Tyndareus, Menelaus and Agamemnon raised a fleet of a thousand ships and went to Troy to secure Helen's return; the Trojans refused, providing a "casus belli" for the Trojan War.