The Sokoto caliphate in nineteenth-century northern Nigeria was an astonishing episode in the history of Africa: a huge, prosperous polity that created unity where none had existed before. Yet today its history is underexplored, sometimes ignored or even disparaged, both within Nigeria and in Europe and the U.S. Yet that history is extraordinary. Sokoto town was, and still is, an anomaly within Hausaland; built speedily on a “green-field” site as both a trading and a political center for the caliphate, it is a site of pilgrimage that to this day remains a rural town with no monumental buildings or fine edifices. As a by-product of a religious movement (jihad), Sokoto thus represents many of the dilemmas that faced and still face radically reforming Islamic groups if they expand rapidly and go to war. Thus Sokoto history remains deeply significant for modern Nigeria.