Horn of Africa covered the Simien and Bale Mountains but melted at the beginning of the Holocene. The mountains descend in a huge escarpment to the Red Sea and more steadily to the Indian Ocean. Socotra is a small island in the Indian Ocean off the coast of Somalia. Its size is 3,600 km (1,390 sq mi) and it is a territory of Yemen. The lowlands of the Horn are generally arid in spite of their proximity to the equator. This is because the winds of the tropical monsoons that give seasonal rains to the Sahel and the Sudan blow from the west.
Operation Enduring Freedom – Horn of Africa of Galkayo, a Somali army unit conducting counterterrorism operations nearby, when the Somali soldiers came under fire from al-Shabab militants. The Somali soldiers engaged them, then broke contact and rejoined with their nearby American advisers and soon afterwards the militants "began to maneuver in an offensive manner" so the U.S. conducted a self-defense airstrike, killing 4 militants. 26 U.S. servicemen have been killed in non-hostile incidents in Djibouti since the start of operations in the Horn of Africa. Three U.S. soldiers were killed in accidents in Kenya. Two U.S. soldiers were killed in a vehicle accident in Ethiopia. Two U.S.