Indigenous people were generally taken in the greatest numbers during battles between the English and Native Americans. They attacked or fought one another for years, partly because of the English people's lack of food and the Native Americans' distress that they were losing their land. On March 22, 1622, 347 or more colonists were killed and English settlements were set on fire during an Indian massacre. Approximately 20 women were taken from Martin's Hundred plantation on the James River and were said to have been put into "great slavery". To prevent escape, the English sent captured Native Americans to British colonies in the West Indies to work as slaves.