One of the big lies told to the public via the corporate media was that black African mercenaries were being used by Gaddafi to commit genocide against the Libyan people. According to the CounterPunch article titled "The Top Ten Myths in the War Against Libya":
[...]In reality, real genocide has occurred against the black Africans living in Libya by the admittedly Al-Qaeda controlled rebels. Black Libyans have been rounded up en-mass with no proof they have done anything wrong and in many cases they have been dragged from their homes and summarily executed, with the excuse being that they must be mercenaries who supposedly were used by Gaddafi to attack his own people.
Patrick Cockburn summarized the functional utility of the myth of the “African mercenary” and the context in which it arose: “Since February, the insurgents, often supported by foreign powers, claimed that the battle was between Gaddafi and his family on the one side and the Libyan people on the other. Their explanation for the large pro-Gaddafi forces was that they were all mercenaries, mostly from black Africa, whose only motive was money”. As he notes, black prisoners were put on display for the media (which is a violation of the Geneva Convention), but Amnesty International later found that all the prisoners had supposedly been released since none of them were fighters, but rather were undocumented workers from Mali, Chad, and west Africa. The myth was useful for the opposition to insist that this was a war between “Gaddafi and the Libyan people,” as if he had no domestic support at all—an absolute and colossal fabrication such that one would think only little children could believe a story so fantastic. The myth is also useful for cementing the intended rupture between “the new Libya” and Pan-Africanism, realigning Libya with Europe and the “modern world” which some of the opposition so explicitly crave.
 The Top Ten Myths in the War Against Libya, MAXIMILIAN C. FORTE, CounterPunch
 Libya: NATO Enabling War Crimes, Tony Cartalucci, Land Destroyer Report
 Libyan rebels round up black Africans, Associated Press