East and West Africa By EimearBrennan 1807 Slavery Abolished 1876 Brussels Conference 1884 British Somaliland Protectorate 1884 Southern Nigeria - Royal Niger Company Rule 1885 Berlin Conference 1885 General Act Signed Lead to the establishment of the effective occupation principle. 1885 North Nigeria - Royal Niger Company Rule 1888 Gambia Settlement 1888 Uganda - British EA Company Rule 1888 British East Africa - Company Rule