From Cyrenaica to Old Ghana: a timeline

117 CE	-	After the revolt in Cyrenaica the defeated Jews fled westward toward the Maghreb and southwest toward the Niger on well worn trade routes used by Carthaginians and Garamantes.
200 CE	-	The latter were lead by the Kara lineage and after two generations settled among the Soninke of Ghana. Other refugees came down from Tuat and placed themselves under the Kara lineage.
300 CE	-	The Soninke were already a civilized people when the Jewish refugees settled among them. The Soninke were of the Mande peoples who had independently invented farming c 3000 BCE   1    and were active trade partners of Carthage and Egypt through Garamante middlemen by 1000 BCE. But the Israelite refugees had been part of cosmopolitan Mediterranean civilization and soon began to rule over the indigenous Soninke and other Mande peoples.
775 CE	-	Besides the ruling Kara lineage, the Gama lineage was the second highest ranking family among the Jews. A Kara emperor slew a Mande favored by the Gama prime minister. That man's widow, Bentigui, was pregnant but the Gama prime minister switched infants at birth. When Bentigui's son grew up and learned what happened to his father, he plotted until he was successful in gaining the emperors confidence. He assasinated the Kara emperor of Ghana and siezed rulership.
> 775 CE	-	Some Jews stayed and became loyal to the new Mande dynasty but others left. They migrated westward to the Senegal and northwest to the south of Morocco.