Note: Al Jazeera is withholding some details of interviewees, such as surnames, to protect their identities. Douankara, Mauritania – One evening in late March, 75-year-old Moctar gathered with his family and friends in Sondaje, a village in northern Mali, to plan their escape. For months, homes had been raided by rival gun-toting warring groups who accused various villagers of collaborating with their enemies. Two of Moctar’s cousins were killed in one such attack. Then one group issued an ultimatum. Recommended Stories list of 4 items list 1 of 4 Are ‘low-cost, high-impact’ drones making Sahel fighters tougher to beat?…