Many of the insurgents encountered were not wearing uniforms, and in some cases were wearing protective vests. Furthermore coalition officials noted that the training, tactics and organization displayed by the insurgents battled in the Syrian desert exceeded that which had been seen in other engagements further east, with only the exception of the former members of the Fedayeen (that comprised a large portion of insurgents fought by the Coalition in Operation Vigilant Resolve.) Thus it is plausible to believe that the Fedayeen made a large portion of the insurgents fought in Matador.