The practice of transporting cheap black labour from western Africa to the New World was begun by the Spaniards in the 16th Century, and it had been also used by the Portuguese, Dutch and French, but it was adopted in earnest by the British in the early 17th Century. The British had established numerous outposts in the Caribbean (dubbed the “West Indies” by Columbus out of the conviction that he had reached the spice islands of the Indies, or Asia, by a western route), and had developed a whole trading empire to take advantage of the tropical climate of the region. The labour-intensive work on tobacco, cocoa, cotton and particularly sugar plantations required large numbers of cheap workers, and the Atlantic slave trade triangle (Britain - West Africa - Americas) was developed to supply it, although soon a demand also grew for household servants.