The Gambia less than wide at its widest point, with a total area of . About (11.5%) of the Gambia's area are covered by water. It is the smallest country on the African mainland. In comparative terms, the Gambia has a total area slightly less than that of the island of Jamaica. Senegal surrounds the Gambia on three sides, with of coastline on the Atlantic Ocean marking its western extremity. The present boundaries were defined in 1889 after an agreement between the United Kingdom and France. During the negotiations between the French and the British in Paris, the French initially gave the
History of the Gambia the following years, ordinances were passed to bring these places under the control of the Protectorate. Finally, a Protectorate Ordinance passed in 1902 brought the whole of the Gambia besides St Mary's Island under the Protectorate system. the Gambia received its own executive and legislative councils in 1901 and gradually progressed toward self-government. Also in 1901, the Gambia Company, the first colonial military unit of the Gambia, was founded. It was formed as part of the Sierra Leone Battalion of the new West African Frontier Force (late Royal West African Frontier Force). A 1906 ordinance abolished slavery. During World War