Ogaden

Ogaden (pronounced and often spelled Ogadēn, Somali: Ogaaden) is a part of the Somali Region in Ethiopia. Sometimes known as "Abyssinian Somaliland," some locals refer to it as Ogadenia (Somali: Ogaadeeniya). The inhabitants are predominantly ethnic Somali and Muslim; The fact that the entire Somali region of Ethiopia is called "Ogadenia" by some is a cause of much friction in the region. As it is an area with a multi clan population. For this reason the titles "Somali Galbeed" and Somali State are the preferred terms.
The region, which is around 150,000 to 200,000 square kilometres, borders Djibouti, Kenya, and Somalia, and has a population of 2,500,000 people. Important settlements include Degehabur, Gode, Jijiga, Kebri Dahar, Shilavo and Werder. The region is at the center of the volatile Horn of Africa.

Link for more details: http://en.wikipedia.org/wiki/Ogaden