Wolof confederation dominating the lower Senegal before fragmenting into rival states.
The Jolof Empire fragmented c. 1549 when Cayor broke away following its victory at the Battle of Danki, triggering the secession of Baol, Waalo, Sine, and Saloum; the rump Kingdom of Jolof persisted until absorbed into French Senegal in 1890.
Broad continental history covering the Wolof states of the Senegambia (regional context, not Jolof-specific).
West African empires survey giving context to the Jolof confederation (broad).