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.

Gombe State is a state in northeastern Nigeria, bordered to the north and northeast by the states of Borno for 93 km in the vicinity of Gongola River and Lake Dadin Kowa and Yobe in the vicinity of Gongola River for 140 km, to the south by Taraba State for 58 km, to the southeast by Adamawa State for 95 km, and to the west by Bauchi State for 277 km. Gombe is the state capital of Gombe state and it was formed from a part of Bauchi State on 1 October 1996. Of the 36 states in Nigeria, Gombe is the 21st largest in area and the 32nd most populous, with an estimated population of about 3.25 million as of 2016. The state bears a slogan "Jewel in the Savannah".