In the 17th century, the Imbangala became the main rivals of the Mbundu in supplying slaves to the Luanda market. In the 1750s, between 5,000 and 10,000 slaves were annually sold. By this time, Angola, a Portuguese colony, was in fact like a colony of Brazil, paradoxically another Portuguese colony. A strong degree of Brazilian influence was noted in Luanda until the Independence of Brazil in 1822. 