  spanish guinea (spanish: guinea espaÃ±ola) was a spanish colony in the gulf of guinea and on the bight of bonny, in central africa. it became the independent nation of equatorial guinea. ==history==  ===18thâ19th centuries=== the spanish colony in the guinea region was established in 1778, by the treaty of el pardo between the spanish empire and the kingdom of portugal. between 1778 and 1810, the territory of equatorial guinea was administered by the viceroyalty of the rÃ­o de la plata, based in buenos aires. from 1827 to 1843, the united kingdom had a base on bioko to combat the slave trade,"fernando po", encyclopÃ¦dia britannica, 1911. which was then moved to sierra leone upon agreement with spain in 1843. in 1844, on restoration of spanish sovereignty, it became known as the "territorios espaÃ±oles del golfo de guinea". ===20th 
Equatorial_GuineaaSpain_relations Former_Spanish_colonies Former_colonies_in_Africa Former_countries_in_Africa History_of_Central_Africa History_of_Equatorial_Guinea Spanish_Africa States_and_territories_disestablished_in_1968 States_and_territories_established_in_1778 Viceroyalty_of_the_RAo_de_la_Plata