What is "kaabu"

The Kaabu Empire (1537–1867), also written Gabu, Ngabou, and N’Gabu', was a Mandinka kingdom of Senegambia centered within modern northeastern Guinea-Bissau but extending into Casamance in Senegal. It rose to prominence in the region thanks to its origins as a former province of the Mali Empire. After the decline of the Mali Empire, Kaabu became an independent kingdom. It was eventually annexed by Futa Jallon during the 19th century Fula jihads prior to the incorporation of the area into the Portuguese and French spheres of influence during the Scramble for Africa.