The Anglo-Norman invasion of Ireland took place during the late 12th century, when Anglo-Normans gradually conquered and acquired large swathes of land from the Irish, over which the kings of England then claimed sovereignty, all allegedly sanctioned by the papal bull Laudabiliter.
The Anglo-Norman invasion was a watershed in Ireland's history, marking the beginning of more than 800 years of direct English conquest and colonialism in Ireland.
Irish Mythology - Mythical Cycle - Book of Invasions
