Nigeria sent a massive deployment of men and resources to fight against Islamists militants in three northern-eastern states. The reason for sending men was to assert the nation “territorial integrity” and to enhance their security. After a series of deadly militant attacks, the President declared a state of emergency in certain states. A group named Boko Haram has been blamed for most of the violence.  They usually attack in the north-east of Nigeria, and it has been said that roughly 2000 people have died since 2010.  Most of the violence has remained in the north east over the last three years, however the group did bomb Nigeria’s capital, Abuja in 2011 and 2012. It is believed that the group has close links with al-Qaeda militants, and access to increasingly sophisticated weaponry. The Boko Haram group is believed to cross back and forth the Cameroon and Nigerian boarder. There are more than 160 million people in Nigeria who are also affected by other conflicts such as land, religion and oil. 

http://www.bbc.co.uk/news/world-africa-22544056