Building peace in the Democratic Republic of the Congo's (DRC) troubled regions requires sustained intervention by a wide range of stakeholders to address aspects of the regional political economy that perpetrate cross-border abuse of the country's abundant resources. Violent competition for control of mineral resources, particularly in northeastern DRC, has involved regular forces as well as militia from the subregion and contributed to a flourishing war economy, many years after the Lusaka Ceasefire Agreement in 1999.