Once settled, the creation of city states and power centers began.
Although Nigeria had just become involved in slave trade with colonial America around 1610, slave trade was being conducted throughout much of the 16th century.
By establishing boundaries and separation, civil wars broke out and continued for the next 40 years.
British help to put an end to Nigerian civil wars.
Under the League of Nations mandate, Germany gave up the colony Kamerun to British-controlled Nigeria.
Nigeria gains its independence from Britain and becomes a republic.
Due to racial tensions, differences of opinion, and unfavorable leaders, Nigeria endured much war for more than three decades because of new people trying to take the role as the nation's president.