Near the end of PERSON@1 's reign -LRB- and throughout the reigns of his sons and grandsons -RRB- , a string of Norse raids began , culminating in a gradual MISC@1 conquest and settlement of the region now known as LOCATION@1 .

Near the end of PERSON@1 's reign and throughout the reigns of his sons and grandsons , a string of Viking raids began , leading to a MISC@1 conquest and settlement of the region now known as LOCATION@1 .
