North East

Adamawa is a state in northeastern Nigeria, with its capital at Yola. In 1991, when Taraba State was carved out from Gongola State, the geographical entity Gongola State was renamed Adamawa State, with four administrative divisions: Adamawa, Ganye, Mubi and Numan.
Bauchi, usually referred to as Bauchi State to distinguish it from the city of Bauchi, is a state in northern Nigeria. Its capital is the city of Bauchi. The state was formed in 1976 when the former North-Eastern State was broken up. It originally included the area now in Gombe State, which became a distinct state in 1996.
Borno, also known as Borno State, is a state in north-eastern Nigeria. Its capital is Maiduguri. The state was formed in 1976 from the split of the North-Eastern State. Until 1991 it contained what is now Yobe State. It is the homeland of the Kanuri people in Nigeria.
Gombe, usually referred to as Gombe State to distinguish it from the city of Gombe, is located in the northeastern part of Nigeria, is one of the country's 36 states; its capital is Gombe. The boundaries of the state roughly correspond to those of the Tangale-Waja Chiefdom and Gombe Emirate, a traditional state.
Taraba is a state in Nigeria, named after the Taraba River which traverses the southern part of the state. Taraba's capital is Jalingo. Taraba State is bounded in the west by Nasarawa State and Benue State, northwest by Plateau State, north by Bauchi State and Gombe State, northeast by Adamawa State, east and south by Cameroon.