J.K. Fynn's brief Asante and Its Neighbors, 1700-1807 seeks to elucidate the rise of Asante under Osei Tutu to its position as the predominant power of the Gold Coast by the early 1800s. While mainly relying on records of the European trading posts and forts on the coast and occasional oral or ethnographic evidence, Fynn's narrative account appears to follow an accurate chronology of Asentehenes also used by scholars like Wilks. The Asante, who were little known to the Europeans in the late 17th century, were able to seize upon the opportunities of greater trade and access to firearms to pursue political and economic expansion. The "northern factor" was also relevant for the trade in gold, ivory, kola nuts, textiles, and slaves with markets in the Sudanic land and trans-Saharan networks. However, access to firearms gave an advantage to the Asante against the militaries of the Dagomba, Gonja, and others. However, Asante access to the coast was hindered by the Fanti and, at various times, by other polities of the Gold Coast. Thus, the history of 18th century Asante, according to Fynn, is, to a large part, the tale of Asante expansion to the south, subjugation of other polities as tributaries, and the eventual establishment of Asante control of the southern ports in the early decades of the 19th century. Unfortunately for them, however, the British commitment to anti-slave trade measures became a problem just as the Asante achieved more complete, unhindered access to the coast.
Part of the problem of the Asante state in the 18th century was the failure of Osei Tutu, who, despite his excellence as the founder of the state who bequeathed a number of customs and practices to foster unity, to develop a more effective administrative system for ruling conquered peoples. Opoku Ware, his successor, attempted reforms that were later blocked by provincial rulers. This, plus ongoing revolts, internal discord, and struggles with the vassals made it difficult for Asante to emerge as the hegemon of the region until closer to the end of the period under examination. Fortunately, later rulers, like Osei Kwadwo, were able to accomplish administrative reforms with a bureaucracy that improved imperial administration. The Asante rulers may have also relied heavily on access to northern markets (and captives, such as the "Duncoes" and their Akwamu allies to still receive firearms, trade goods, and find areas for political expansion. Asante's conquest of Gonja and Dagomba, for instance, must have assisted with these aims as Asante expansion to the coast was hindered by the Fanti or tributary states in rebellion. The northern factor, therefore, must have remained of great political, military and economic significance while the Atlantic trade with European was ultimately the source for the Asante's expansion through access to muskets and gunpowder. Trying to understand this dynamic role of northern trade and Atlantic trade in the fortune of West African states like Asante and Oyo seems especially relevant, even though Asante did not rely on cavalry supplied by horse imports from northern trade.
Of interest for our purposes is Fynn's comments on the "Dunko" or "Dunkoes" sold into slavery from the Gold Coast. According to sources cited by Fynn, the word "Donko" meant slave. In addition, the Dunkos often had tribal marks on their faces and were often associated with northern territories like Dagomba, Mossi, Frafraf and others. We know from the Arabic chronicles of northern Ghana and contemporary Europeans at the coast that the Asante were active in north in the 1740s and again in the 1770s and subsequent decades. Indeed, a revolt against the Asante in 1780-1781 was likely one of the Dagomba, referred to as Duncoes. The Dunkos of Saint Domingue, or colonial Haiti, were therefore a mix of people from what is now northern Ghana and surrounding areas. Some of these Dunkoes or Dokos were also maroons of Le Maniel. If some of them were natives of Dagomba, then perhaps there may even have been an Islamic presence among the Duncoes in Saint Domingue.