At least 21 schoolchildren in Nigeria have been rescued hours after they were abducted by armed groups in the West African country’s troubled northwestern region. A day after the attack on the schoolchildren, the Nigeria Air Force launched “successful” airstrikes targeting the camps of the gunmen in Zamfara state. The large bands of assailants mostly consist of young men from the Fulani ethnic group, who had traditionally worked as nomadic cattle herders and are caught up in a decades-long conflict with Hausa farming communities over access to water and grazing land. This is not the first such incident. There is a long history.