Senegambia was the collective noun for the fortifications and trading posts

Factory (trading post)

Factory was the English term for the trading posts system originally established by Europeans in foreign territories, first within different states of medieval Europe, and later in their colonial possessions...

 owned by the Dutch West India Company

Dutch West India Company

Dutch West India Company was a chartered company of Dutch merchants. Among its founding fathers was Willem Usselincx...

 in the area that nowadays is called Senegal

Senegal

Senegal , officially the Republic of Senegal , is a country in western Africa. It owes its name to the Sénégal River that borders it to the east and north...

. The main purpose of these trading posts was to obtain slaves in order to ship them to America . The government of the territory was based on Gorée

Gorée

Île de Gorée Île de Gorée Île de Gorée (i.e. "Gorée Island"; is one of the 19 communes d'arrondissement (i.e. "commune of arrondissement") of the city of Dakar, Senegal. It is a island located at sea from the main harbor of Dakar ....

. In 1677 the Dutch

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

 lost this island to France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. The next year the French also conquered all DWIC trading posts on the Senegalese coast as well as the island of Arguin

Arguin

Arguin is an island off the western coast of Mauritania in the Bay of Arguin, at 20° 36' N., 16° 27' W. It is six km long by two broad. Off the island are extensive and dangerous reefs...

.

Having lost almost all the trade in gum arabic

Gum arabic

220px|thumb|right|Acacia gumGum arabic, also known as acacia gum, chaar gund, char goond, or meska, is a natural gum made of hardened sap taken from two species of the acacia tree; Acacia senegal and Acacia seyal...

, bezoar stone

Bezoar

A bezoar is a mass found trapped in the gastrointestinal system , though it can occur in other locations. A pseudobezoar is an indigestible object introduced intentionally into the digestive system....

, ambergris

Ambergris

Ambergris is a solid, waxy, flammable substance of a dull gray or blackish color produced in the digestive system of and regurgitated or secreted by sperm whales....

 and ostrich

Ostrich

The Ostrich is one or two species of large flightless birds native to Africa, the only living member of the genus Struthio. Some analyses indicate that the Somali Ostrich may be better considered a full species apart from the Common Ostrich, but most taxonomists consider it to be a...

 feathers, the DWIC wanted to regain its position.
The Frenchman Jean du Casse

Jean du Casse

Jean Baptiste du Casse was a French Buccaneer and Admiral.In his youth, he was not allowed into the French Navy because his parents were Huguenots...

, head of the Compagnie de Sénégal, reached an agreement with the local leaders, who decided to destroy the Dutch trading posts and the DWIC lost its position for good.

Senegambia possessions of the DWIC

• Gorée
  Gorée
  Île de Gorée Île de Gorée Île de Gorée (i.e. "Gorée Island"; is one of the 19 communes d'arrondissement (i.e. "commune of arrondissement") of the city of Dakar, Senegal. It is a island located at sea from the main harbor of Dakar ....
  
  : 1617 - 1663, 1664 - 1677.

With the fortifications: Nassau and Orange.

Trading posts:

• Portudal
  Saly
  Saly is a seaside resort area on the Petite Côte of Senegal, south of Dakar. It is the top tourist destination in all of West Africa.-History:...
  
  : 1633 - 1678. Here the DWIC bought slaves and ivory
  Ivory
  Ivory is a term for dentine, which constitutes the bulk of the teeth and tusks of animals, when used as a material for art or manufacturing. Ivory has been important since ancient times for making a range of items, from ivory carvings to false teeth, fans, dominoes, joint tubes, piano keys and...
  
  .
• Rufisque
  Rufisque
  Rufisque is a city in the Dakar region of western Senegal, at the base of the Cap-Vert Peninsula. It has a population of 179,797 . In the past it was an important port city in its own right, but is now a suburb of Dakar....
  
  : 1633 - 1678.
• Joal: 1633 - 1678.