For 10 points, name this country bordered on its west by a namesake lake, with capital at N'Djamena.
One ethnic group in this nation is known for an initiation ritual known as Yondo. That ethnic group, the largest in this nation, is the namesake of the capital of this nation's Moyen-Chari region, which is also home to its Tupuri people. This nation which is home to the Sara people is also the site of Moundou, which lies on a river which flows northwest to meet the (*) Chari River. That confluence of the Logone River is home to this nation's capital, which is linked by a bridge to the city of Kousseri. That capital of this country is located southeast of this nation's best known feature, which is fed by the aforementioned rivers, but which has ► shrunk up to 95%. For 10 points, name this country bordered on its west by a namesake lake, with capital at N'Djamena.
One ethnic group in this nation is known for an initiation ritual known as Yondo.
Chad