Adamawa State is a state in the North-East geopolitical zone of Nigeria, bordered by Borno to the northwest, Gombe to the west for 95 km, and Taraba to the southwest for about 366 km, while its eastern border forms part of the national border with Cameroon across the Atlantica Mountains for about 712 km. It takes its name from the historic emirate of Adamawa, with the emirate's old capital of Yola, serving as the capital city of Adamawa state. The state is one of the most heterogeneous in Nigeria, with over 100 indigenous ethnic groups. It was formed in 1991, when the former Gongola state was divided into Adamawa and Taraba states. Since it was carved out of the old Gongola State in 1991 by the General Ibrahim Badamsi Babangida military regime, Adamawa State has had 10 men, both military and civilian, controlling the levers of power, who played crucial roles in transforming the state into what it is today.

Borno State is a state in the North-East geopolitical zone of Nigeria, bordered by Yobe to the west for about 421 km, Gombe to the southwest for 93 km, and Adamawa to the south while its eastern border forms part of the national border with Cameroon for about 426 km, its northern border forms part of the national border with Niger, for about 223 km mostly across the Komadougou-Yobe River, and its northeastern border forms all of the national border with Chad for 85 km, being the only Nigerian state to border three foreign countries. It takes its name from the historic emirate of Borno, with the emirate's old capital of Maiduguri serving as the capital city of Borno State. The state was formed in 1976 when the former North-Eastern State was broken up. It originally included the area that is now Yobe State, which became a distinct state in 1991.