Tigray Region
Tigray Region (, "kilil Tigrāy;" Official name: , "Bəh̩erawi Kəllelawi Mängəśti Təgray", "Tigray National Regional State") is the northernmost of the nine regions ("kililat") of Ethiopia. Tigray is the homeland of the Tigrayan, Irob and Kunama peoples. Tigray is also known as Region 1 according to the federal constitution. Its capital and largest city is Mekelle. Tigray is the 6th largest by area, the 5th most populous, and the 5th most densely populated of the 9 Regional States.
Tibesti Region
The Tibesti Region is located in the Sahara. It contains part of the Tibesti Mountains, and part of the Erg of Bilma, a vast area of sand dunes in the center of the desert. The region's northern border lies on the Aouzou Strip, a point of dispute between Chad and Libya. The region also shares a border with Niger. The capital, Bardaï, is located in the northern part of the region.