In 1994, almost one million ethnic Tutsis were killed in the genocide in Rwanda. In the aftermath of the genocide, some of the top-echelon Hutu officers who had organized it fled Rwanda to the eastern Congo (DRC) and set up a new base for military operation, with the goal of retaking power in Kigali, Rwanda. More than twenty years later, these rebel forces comprise a diverse group of refugees, rebel fighters, and civilian dependents who operate...