Private military contractors have been an integral part of Saudi Arabia's strategy to win it's ground war in Yemen, something the inexperienced Saudi military has been unable to accomplish. (Khalid Mohammed/AP)

DynCorp Mercenaries Enter Yemen As Death Toll Climbs

Mercenaries from DynCorp have entered Yemen to fight for the Saudi-led coalition after fighters from the infamous Blackwater group were routed by the Houthis.