The overall aim of the research is to examine the history of Terrorism in West Africa, its causes and current manifestations , and the West African response to Terrorism. A proper analysis has been done on terrorism in West African countries including Nigeria and Mali, the two most impacted nations in the sub region. The ECOWAS counterterrorism policy has also been covered in this research along with the issues and difficulties that Nigeria is facing in the political environment throughout the world as well as the variables that influence its capacity to react Furthermore, the Nigerian’s response has been investigated to the emergence and threat of Terrorism in West Africa.