The first waves of Vietnamese immigrants to Norway came after the Fall of Saigon, in 1975. They escaped Vietnam by boat, and were also known as the boat people. Some were picked up by Norwegian cargo ships and came to Norway after spending some months in refugee camps in East Asia and Southeast Asia. Most of these boat people came in the period from 1978 to 1985. Later immigrants have come as a cause of family-reunification and economic reasons.