What was a significant change introduced by the Shehus in the administration of Borno?

The Shehus centralized military power in Borno during the 1800s. They created a unified army under their direct control. This made the state stronger against external threats.

Borno was already Islamic, so Sharia existed before the Shehus. Christianity never became significant in Borno. The slave trade continued during Shehu rule.

Military centralization helped Borno resist the Fulani Jihad. A strong unified army could respond quickly to invasions.