What role did Modibbo Adama play in the Fulani expansion?

Modibbo Adama played a pivotal role in the Fulani expansion by leading a jihad (holy war) in the region beginning in 1809. Appointed by Sheikh Usman dan Fodio, Adama was tasked with overseeing the expansion across large areas centered in northern Nigeria, which were subsequently incorporated into the Sokoto empire.12

Adama founded the traditional emirate of Fumbina (later known as Adamawa), which served as the easternmost emirate of the Fulani empire. By the time of his death in 1848, his kingdom had expanded to encompass most of northern Cameroon and parts of eastern Nigeria. He established the capital of his emirate in Yola in 1841, which remained the seat of the emirate thereafter. Through his leadership, the Fulani influence became a powerful force in the northern and central portions of the region.123