Indentured servitude was a labor system whereby young people paid for their passage to the New World by working for an employer for a certain number of years. It was widely employed in the 18th century in the British colonies in North America and elsewhere. It was especially used as a way for poor youth in Britain and the German states to get passage to the American colonies. They would work for a fixed number of years, then be free to work on their own. The employer purchased the indenture from the sea captain who brought the youths over; he did so because he needed labour. Some worked as farmers or helpers for farm wives, some were apprenticed to craftsmen. Both sides were legally obligated to meet the terms, which were enforced by local American courts. Runaways were sought out and returned. About half of the white immigrants to the American colonies in the 17th and 18th centuries were indentured. During the late 17th and early 18th centuries poor children from England and France were kidnapped and sold into indentured labor in the Caribbean for a minimum of five years, but most times their contracts were bought and sold repeatedly and some laborers never attained their freedom.