Cabo Delgado has been the scene of armed attacks perpetrated by an armed group since October 2017 that has assaulted and destroyed public and private institutions, including police posts and military barracks. It murders and abducts people, leaving traces of destruction and fatality unrelenting in some Districts of Cabo Delgado Province, where there are records of more than 300,000 refugees welcomed in centres and transitional families in the neighboring Districts and Provinces that are still safe. The clarification about "armed violence in Cabo Delgado" has as its central foundation to understand the identification and motivation of the group that is leading attacks in that province, as well as to understand the challenges that are imposed on the Mozambican State in the face of the insecurity caused by the group. The preparation of this article was based on the analysis of information circulating on social networks, media and some bibliographies dealing with the matter. In order to combat the armed group, the Mozambican State mobilized the Defence and National Security forces on the ground and at the same time mobilizes support to assist the refugee populations in the Districts and Provinces that are still safe.