The South African Institute for Strategic Studies reports that a number of ex South African Defence Force soldiers have been hired by the Nigerian government to train the Nigerian Defence Force to fight Boko Haram (in addition to 'official' military contributions from USA, France and UK).
Intelligence sources also say that a number of former South African Air Force pilots have been hired under a separate contract to fly NAF Hinds for day and night operations against Boko Haram. This may be one of the reasons that the Nigerian military is claiming a number of successes in recent operations against Boko Haram.
South Africans Hired to Help Fight Boko Haram