In OTL in year 1591, Morocco under Ahmad Al Mansur Al Saadi invaded Morocco to recover his kingdom's finance from the exhaustion brought by Battle of Ksar el Kebir 14 years prior. Say, perhaps Ksar el Kebir had led to even worse financial situation for Morocco, perhaps actual bankruptcy, or that he listened to his advisors about not attacking fellow muslims, or he perhaps died earlier. Anything that prevented him from attacking. What will it do to Sahel ? Songhay was quite in her prime during the invasion, under the reign of Askia Ishaq, and was just about to consolidate into a more centralized empire. In Songhay Empire, the elite were muslim, but the majority of population still adhered to traditional religions. The collapse of Songhay Empire led to the rise of anarchy that gave way to widespread slaving industry and fertile ground for radical Jihad movements by followers of Tijaniyah Tariqat. With an enduring Songhay Empire, how much will it change West Africa ? Will we see less Atlantic slave trade ? If so, have we canceled Europea colonization of the interior West Africa altogether long before it has even begun ? How about West African society and culture ?