Horn of Africa at the 2012 London Olympics. According to the IMF, in 2010 the Horn of Africa region had a total GDP (PPP) of $106.224 billion and nominal of $35.819 billion. Per capita, the GDP in 2010 was $1061 (PPP) and $358 (nominal). States of the region depend largely on a few key exports: Over 95% of cross-border trade within the region is unofficial and undocumented, carried out by pastoralists trading livestock. The unofficial trade of live cattle, camels, sheep and goats from Ethiopia sold to other countries in the Horn and the wider Eastern Africa region, including Somalia and Djibouti, generates
Horn of Africa Yejju Oromo tribe as well as Wollo and Raya Oromo. The Sultanate of the Geledi was a Somali kingdom administered by the Gobroon dynasty, which ruled parts of the Horn of Africa during the 18th and 19th centuries. It was established by the Ajuran soldier Ibrahim Adeer, who had defeated various vassals of the Ajuran Empire and established the "House of Gobroon". The dynasty reached its apex under the successive reigns of Sultan Yusuf Mahamud Ibrahim, who successfully consolidated Gobroon power during the Bardera wars, and Sultan Ahmed Yusuf, who forced regional powers such as the Omani Empire to submit