Adama's forces proved all but unstoppable. He conquered major Vute centres at Mbamnyang and Tibaré in 1835, which he renamed Banyo and Tibati. At Adama's death in 1847, Fulbe horsemen controlled territory from the Niger River to the west and the Logone to the east and from the Sahara to the north and the Sanaga River to the south to form the Sokoto Caliphate. Adama's emirate (known as the Adamawa Emirate) was divided into districts under governors; the Adamawa Plateau fell into the Ngaoundéré subdivision.