Key features of a black operation are that it is secret and it is not attributable to the organization carrying it out. This US Douglas A-26 C Invader was painted in fake Cuban Air Force colors for the military invasion of Cuba undertaken by the USAF sponsored paramilitary group Brigade 2506 in April 1961.Ī black operation or black op is a covert or clandestine operation by a government agency, a military unit or a paramilitary organization it can include activities by private companies or groups.