This study examines the historical roots of insecurity in Adamawa State, Northeast Nigeria, and their implications for community development, using a pragmatic, mixed-methods research design. Data were collected from a stratified random sample of 400 household heads across six Local Government Areas (Madagali, Maiha, Michika, Mubi North, Mubi South, and Numan), determined using the Yamane (1967) formula at a 95% confidence level, and complemented by qualitative key informant interviews and focus group discussions with traditional and religious leaders, local government officials, security personnel, humanitarian workers, and community members. Quantitative data were analysed using descriptive statistics and chi-square tests of association, while qualitative data were analysed thematically and integrated with the quantitative findings through a joint-display approach. Demographic analysis showed a sample of 54.0% male and 46.0% female respondents, with the majority (66.0%) married and engaged predominantly in farming (44.0%). The chi-square test of association between household conflict exposure and development access was statistically significant (χ² = 105.585, df = 4, p < .001, Cramer’s V = .363), confirming a moderate-to-strong inverse relationship: households with higher conflict exposure reported markedly lower access to infrastructure, livelihood stability, educational continuity, and health services. Qualitative findings situated these outcomes within historical narratives tracing to the nineteenth-century Fulani jihad, the 1809 establishment of the Adamawa Emirate, colonial-era administrative arrangements, and long-standing Fulani-Bachama intergroup relations, particularly in Numan. The study concludes that historically rooted structural inequality, rather than insurgency alone, substantially conditions present-day vulnerability to conflict-related developmental setbacks in Adamawa State, and recommends recovery interventions that are historically informed, LGA-differentiated, and attentive to traditional governance structures.

Keywords: historical roots of insecurity, Boko Haram, banditry, development, Adamawa State, mixed-methods research, Yamane sample size, Lake Chad Basin.