The Anglo-French Convention of 1889 was a diplomatic agreement signed on August 10, 1889, between Great Britain and France that delimited the border between the Gambia Protectorate and the colony of Senegal, as well as between the Lagos Colony and Dahomey.[1] [2] The Senegambian border was set at ten kilometers north and south of the river as far inland as Yarbutenda (near modern-day Koina, The Gambia), with a 10 km radius to mark the eastern border measured from the center of town. The British therefore controlled the river as far as it was navigable by sea-going vessels. Though widely seen as temporary at the time, this borders set in 1889 has remained unchanged ever since.[3]