Top family vacations 2015 for MEHRENE LARUDEE, PH.D. UNIVERSITY OF KANSAS Nigeria THE FEDERAL REPUBLIC of Nigeria covers 923,768 square kilometers in western Africa and encompasses 36 internal states. Nigeria is a country of diversity. Its climate ranges from equatorial in the south to tropical in the center and arid in the north. Over 25 ethnic groups make up its population, often creating disagreements over how the economy of the country should be managed. As a British colony, Nigeria’s abundant resources were often exploited, but the British moved the nation forward with public roads, railroads, and increased export trade. Top family vacations 2015 2016.