This study investigated how peace marketing strategies can reduce bullying and cultism in secondary schools in Diobu, Port Harcourt, Rivers State, Nigeria. The specific objectives were to ascertain the influence of peace education campaigns, positive school media messaging, and curriculum integration on reducing bullying and cultism in secondary schools in Diobu. Data for the study were collected using a structured questionnaire administered to 400 individuals via stratified random sampling. The data were analysed, and the hypotheses were tested using simple regression. The study revealed that the intervention of peace marketing strategies: peace education campaigns, positive school media messaging, and curriculum integration significantly reduces violent behaviours and influences students’ attitudes toward nonviolence. As such, it is recommended that educational authorities should formally adopt peace marketing as part of school safety and well-being policies. Teachers and administrators should be trained in participatory peace education methods and conflict resolution. School media should be used strategically to reinforce nonviolence, empathy, and inclusion. Curricular reform should integrate peace values across subjects to ensure holistic learning. Community-based collaborations should support school interventions to address external influences such as gang activity and political manipulation.
