Since the year 2013, Nigeria’s northeastern region epicenter of the Boko Haram Islamist insurgency waging war for the establishment of an Islamic State has witnessed mass participation of people in a civil militia group. The militia group colloquially describing itself Civilian Joint Task Force (CJTF) was formed to combat the Boko Haram rebellion. Perhaps, the participation of the CJTF in the combating activities was reportedly influential in reducing the Boko Haram hostilities in most communities. Prior to the CJTF, the counterinsurgency approaches of the Nigerian governments’ Special Joint Task Force and the Multinational Joint Task Force of the Member States of Lake Chad Basin Commission was faced with lackadaisical performances. Whereas the CJTF was reportedly successful, however, the interrupted participation of the people despite the attendant human and material cost has risen suspicion among the population and the critical literature about the groups’ true motivation. This article, therefore, investigated the motivations of the CJTF in northeastern Nigeria. The study was conducted through a qualitative approach designed in a case study. The data was collected from thirteen informants from three groups - CJTF, Community Leaders and State/Local Government authorities. The technique of data collection is in-depth interviews and non-participant observation. The finding revealed personal incentive factors of monetary/material gains, and the futuristic interest of employability drives peoples’ participation. To address the economic interests of the CJTF and as a panacea to prevent the manifestation of the security threats associated with the CJTF group, the study recommends for the establishment of charity centers to receive contributions from well to do citizens to ameliorate the economic needs of the participants. The government should also propound strong legal mechanisms to regulate the activities of the CJTF militia.