In the 9th century, Vikings began raiding and founding settlements along Ireland's coasts and waterways, which became its first large towns. Over time, these settlers were assimilated and became the Norse-Gaels. After the Norman invasion of 1169–71, large swathes of Ireland came under the control of Norman lords, leading to centuries of conflict with the native Irish. The King of England claimed sovereignty over this territory – the Lordship of Ireland – and the island as a whole. However, the Gaelic system continued in areas outside Anglo-Norman control. The territory under English control gradually shrank to an area known as the Pale and, outside this, many Hiberno-Norman lords adopted Gaelic culture.