Chad, officially known as the Republic of Chad, is a landlocked country located in north-central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west. N’Djamena is the capital and largest city. Chad is known for its diverse ethnic groups, including Arab, Sara, and Kanembu. It faces various challenges, including political instability, economic underdevelopment, and environmental issues such as desertification.