歳入
Kanem-Bornu under Alooma was strong and wealthy. Government revenue came from tribute (or booty if the recalcitrant people had to be conquered) and duties on and participation in trade. Unlike West Africa, the Chadian region did not have gold. Still, it was central to one of the most convenient routes across the Sahara desert. Between Lake Chad and Fezzan lay a sequence of well-spaced wells and oases and from Fezzan there were easy connections to North Africa and the Mediterranean. Many products were sent north, including natron (sodium carbonate), cotton, kola nuts, ivory, ostrich feathers, perfume, wax, and hides, but the most profitable trade was in slaves. Imports included salt, horses, silk, glass, muskets, and copper.