Manjak people or the Manjaco (Manjak: French: Mandjak; Portuguese: Manjaco; Wolof: Njaago; Jola: Manjago) are a West African ethnic group who primarily reside in Guinea-Bissau with smaller communities in The Gambia, Portugal, Senegal and Cape Verde. The Manjaco constitute about 14% of the population of Guinea-Bissau. Within Guinea-Bissau, the people primarily live in the Bassarel and Babok areas in the northern coastal Cacheu Region. The Manjak language is classified as part of the Bak languages, which is a branch of Niger–Congo. Based on early Portuguese records and observations, the Manjaco power structure and society was robust and well established. The people lived in a semi-feudal system where villages were under the subjugation of a leader and that leader reported to the king of the Bassarel and Babok areas, referred to as the King of Bassarel. The king of Bassarel presided over a federation of areas some of which were more prosperous and had a greater population than the Bassarel, but nonetheless still reported to the King. The King and aristocracy maintained a higher standard of living through relatively heavy taxation of their subjects as the majority of people participated in the production of rice. The Manjaco along with other groups developed a unique system of agriculture unique to West Africa referred to as, Bolanhas in Portuguese. The system entails a series of dikes, drainage canals, and rice paddies within mangrove swamps to cultivate rice. Early Portuguese explorers in the area were highly impressed by the complexity and efficiency of these agricultural systems. While the Portuguese colonists most likely made contact with the Manjaco as early as the late 15th century the colonists did not enter the interior lands of Guinea-Bissau and therefore they did not have extensive contact with the Manjaco for much of the colonial history. However, during this initial period Portuguese authorities living in Cacheu gave tribute to the Manjaco leaders.