Tuatha Dé Danann
Their three husbands, Mac Cuill, Mac Cecht and Mac Gréine, were kings of the Tuatha Dé Danann at that time, and asked for a truce of three days, during which the Milesians would lie at anchor nine waves' distance from the shore. The Milesians complied, but the Tuatha Dé Danann created a magical storm in an attempt to drive them away. The Milesian poet Amergin calmed the sea with his verse, then his people landed and defeated the Tuatha Dé Danann at Tailtiu. When Amergin was called upon to divide the land between the Tuatha Dé Danann and his own people, he cleverly allotted the portion above ground to the Milesians and the portion underground to the Tuatha Dé Danann. The Tuatha Dé Danann were led underground into the Sidhe mounds by Manannán mac Lir and Tir na nOg onto a flowery plain/plain of honey attested to in the Voyage of Bran.