History of the Gambia The Courlanders remained dominant until 1659 when their possessions were handed over to the Dutch West India Company. In 1660, the Courlanders resumed possession, but the next year were expelled by the newly formed Royal Adventurers in Africa Company. In 1667, the rights of the Royal Adventurers to the Gambia were sublet to the Gambia Adventurers but later reverted to the new Royal African Company. 1677 saw the beginning of a century-and-a-half-long struggle between the English and French for supremacy over the Gambia and Senegal. The English possessions were captured several times by the French, but in the Treaty of
Wildlife of the Gambia period. This practice has since changed to two or three years rotation. While the agricultural crops grown are sorghum, millet and ground nuts, the tree species retained, within the lands cleared for agricultural use, are the "Acacia albida", baobab, ficus species, winterthorn and African locust "(Parkia biglobosa)". Savanna and the Sahel habitats are of two types. One is the southern Guinea savanna which has rich and dense vegetation of over 50 tree species. The other is the Sudan Savanna which is contiguous to the Guinea savanna on the north bank of the Gambia River. These areas are dry woodlands with