1. OUR AFRICA
http://www.our-africa.org/history-war-and-politics
2. DW MADE FOR MINDS
http://www.dw.com/en/africa-and-the-first-world-war/a-17573462
3. THE WILL
http://thewillnigeria.com/news/buhari-identifies-major-causes-of-conflict-in-nigeria/