The municipality of Campo, comprising a forest area incorporated into the 776,202-hectare Campo-Ma’an Technical Operational Unit (TOU) in Cameroon, is dedicated to the implementation of several development projects such as new agro-industrial projects. The project discussed in this study is the establishment of a new oil palm plantation and oil processing units, which aimed to convert 60,000 hectares of forest into an oil palm plantation. The rationale for this project may have originated from the palm oil production deficit in Cameroon estimated at 180,000 ton. This agro-industrial project, however, has had devastating effects on the environment, biodiversity, and the livelihoods of local communities who depend on the forest for food, firewood, and other resources. This case study recounts the actions of Green Development Advocates (GDA), a Cameroonian civil society organization (CSO) that initiated advocacy to defend the rights of impacted local communities. The approach involved mobilizing different stakeholders to take actions and carrying out analysis to highlight the illegalities and impacts of the project. Meanwhile, support was provided to the communities for various income-generating activities such as livestock rearing to limit these impacts and strengthen their resilience in the face of the drastic decrease in their personal and communal use of forest space. The results obtained were encouraging, given that the area of the land to be used for the agro-industry project was significantly reduced to 40,000 hectares. While this was the case, the prospects are not all that bright as the amount of forest land given out is still significantly high. This case study reviews these facts and discusses perspectives for the project’s ongoing establishment in the area.