São Domingos is both a

Sector Sector may refer to: Places * Sector, West Virginia, U.S. Geometry * Circular sector, the portion of a disc enclosed by two radii and a circular arc * Hyperbolic sector, a region enclosed by two radii and a hyperbolic arc * Spherical sector, a po ...

and a city in the Cacheu Region of

Guinea-Bissau Guinea-Bissau, officially the Republic of Guinea-Bissau, is a country in West Africa that covers with an estimated population of 2,026,778. It borders Senegal to Guinea-Bissau–Senegal border, its north and Guinea to Guinea–Guinea-Bissau b ...

. The sector contains the main

border checkpoint A border checkpoint is a location on an international border where travelers or goods are inspected and allowed (or denied) passage through. Authorization often is required to enter a country through its borders. Access-controlled borders of ...

Senegal Senegal, officially the Republic of Senegal, is the westernmost country in West Africa, situated on the Atlantic Ocean coastline. It borders Mauritania to Mauritania–Senegal border, the north, Mali to Mali–Senegal border, the east, Guinea t ...

between Jegue (on the Guinean side), Mpack on the Senegalese.

History

There was a Portuguese trading post at Sao Domingos (known in the local

Banyum language Banyun (Banyum), Nyun, or Bainouk, is a Senegambian language, Senegambian language group of around 8 closely related languages in Senegal and Guinea-Bissau. Spellings are ''Bagnoun, Banhum, Banyung'' and ''Bainuk, Banyuk''; other names are ''Elo ...

as Buguendo) at least as early 1535, by which point it had attained a semi-unofficial status. In the late sixteenth century, however, relations between the Portuguese ''

lançados The ''lançados'' (literally, ''the launched ones'') were settlers and colonizers of Portuguese origin in Senegambia, Cabo Verde, Guinea, Sierra Leone, and other areas on the coast of West Africa. Many were Jews—often New Christians—escaping ...

'' and the native

Bainuk people The Bainuk people (also called Banyuk, Banun, Banyun, Bainouk, Bainunk, Banyum, Bagnoun, Banhum, Banyung, Ñuñ, Elomay, or Elunay) are an ethnic group that today lives primarily in Senegal as well as in parts of Gambia and Guinea-Bissau. Etymol ...

deteriorated. The late 1570s saw the Europeans invite the king of Kassa to attack the town; despite this victory, conditions did not improve, and the traders relocated to another town further upriver. This experiment likewise failed, and the center of the ''lancados'' trade moved across the river to

Cacheu Cacheu is a town in northwestern Guinea-Bissau lying on the Cacheu River, capital of the eponymous region. Its population was estimated to be 9,849 . Etymology The town of Cacheu is situated in territory of the Papel people. The name is of Bai ...

. In 2016 it was announced that this border crossing would be significantly developed with funding from the UEMOA.Announcement of the new border facilities project
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Notes

Cacheu region Guinea-Bissau–Senegal border crossings Sectors of Guinea-Bissau Populated places in Guinea-Bissau {{guineaBissau-geo-stub