Tambacounda, formerly known as Sénégal Orientale, is a region of Senegal. It used to be part of the Mali Empire before the borders were created to separate Mali from Senegal. Tambacounda is physically the largest of Senegal's 14 regions, but is sparsely populated and its economy lags behind the rest of the country. The department of Kédougou was separated from Tambacounda in 2008, and became a separate region.