adama and his men retreated to yola (in present-day nigeria). the town would become his capital by 1841. from here, he and his lieutenants continued to expand the emirate, which he named adamawa after himself. the subordinates had to send him tribute in the form of cattle. large settlements such as maroua, garoua, and ngaoundéré fell to adama or his lieutenants. by 1825, the fulani had penetrated the adamawa plateau. nevertheless, adama lived in relatively moderate surroundings and never acquired great wealth.