Answer:
A Civil War between Christians and Muslims
Step-by-step explanation:
Unlike any other countries, there are no one dominant religion that held by the vast majority in Nigeria. Nigeria had a strong Muslim influence from Middle east traders that came into their territory from north African route and strong Christian influence from the Europeans that colonize the territory,.
Nigeria has around 50% Muslim population and 49% of Christian population.
After independence was created both of these groups fought over who should control the Government leading up to the Civil war between Christians and Muslims in 1960s.