The mercenaries in Libya are likely former rebels from regions like Darfur, Chad, and Niger, places where Qaddafi has helped support uprisings over the years. Due to the orderly nature of their arrival, Libyan intelligence probably oversaw the hiring and transport. A typical mercenary would be in his 20s, have no high-school education, and little to no formal military training. He might carry an easy-to-maintain assault rifle like the AK-47. If Qaddafi is toppled, whichever mercenaries haven’t been killed will likely truck back to their home countries, where few job prospects are waiting for them.