Advance of the Islamic Courts Union the UN Security Council resolution to deploy an African-led peacekeeping force known as IGASOM, delivery of humanitarian aid, as well as warnings against the spread of extremist and terrorist groups in the region, including Al-Qaeda. As part of Operation Enduring Freedom, the Combined Joint Task Force - Horn of Africa was established in Djibouti. It serves to monitor and check the spread of terrorism, as well as deal with piracy. It has also undertaken humanitarian missions in the region, but it has no mandate towards the conflict in Somalia. The US denies any direct military operations in Somalia, or in
Geography of Somalia the northeast, "Boswellia" and "Commiphora" trees are sources, respectively, of the frankincense and myrrh for which Somalia has been known since ancient times. A broad plateau encompassing the northern city of Hargeysa, which receives comparatively heavy rainfall, is covered naturally by woodland (much of which has been degraded by overgrazing) and in places by extensive grasslands. Parts of this area have been under cultivation since the 1930s, producing sorghum and maize; in the 1990s it constituted the only significant region of sedentary cultivation outside southwestern Somalia. The Haud south of Hargeysa is covered mostly by a semiarid woodland of scattered