 His realm was, however, threatened by dangers from without, as large numbers of his opponents had taken refuge, not only in Iceland, then recently discovered; but also in the Orkney Islands, Shetland Islands, Hebrides Islands, Faroe Islands and the northern European mainland.However, his opponents' leaving was not entirely voluntary.Many Norwegian chieftains who were wealthy and respected posed a threat to Harald; therefore, they were subjected to much harassment from Harald, prompting them to vacate the land.