The US bombing of Libya in support of rebel clients in the spring of 2011 is part and parcel of a sustained policy of military intervention in Africa since at least the mid 1950’s.
According to a US Congressional Research Service Study  published in November 2010, Washington has dispatched anywhere between hundreds and several thousand combat troops, dozens of fighter planes and warships to buttress client dictatorships or to unseat adversarial regimes in dozens of countries, almost on a yearly bases.
The record shows the US armed forces intervened 46 times prior to the current Libyan wars. The countries suffering one or more US military intervention include the Congo, Zaire, Libya, Chad, Sierra Leone, Somalia, Rwanda, Liberia, Central African Republic, Gabon, Guinea-Bissau, Kenya, Tanzania, Sudan, Ivory Coast, Ethiopia, Djibouti and Eritrea.
The only progressive intervention was in Egypt under Eisenhower who forced the Israeli-French-English forces to withdraw from the Suez in 1956.
Between the mid 1950’s to the end of the 1970’s, only 4 overt military operations were recorded, though large scale proxy and clandestine military operations were pervasive. Under Reagan-Bush Sr. (1980-1991) military intervention accelerated, rising to 8, not counting the large scale clandestine ‘special forces’ and proxy wars in Southern Africa. Under the Clinton regime, US militarized imperialism in Africa took off. Between 1992 and 2000, 17 armed incursions took place, including a large scale invasion of Somalia and military backing for the Rwanda genocidal regime.
Clinton intervened in Liberia, Gabon, Congo and Sierra Leone to prop up a long standing stooge regime. He bombed the Sudan and dispatched military personnel to Kenya and Ethiopia to back proxy clients assaulting Somalia. Under Bush Jr. 15 US military interventions took place, mainly in Central and East Africa. (continue reading by the link above.....)