Ribbon 44 of season 4 has to be the most annoying officer challenge yet. You need to revive 15 teammates in warzone using the kiosk. However, there's an easy way to do it : supply runs. A supply run will let you revive one teammate. Message me on Xbox : xXDTK OWNERXx or on activision : Baconmaster69 to team up and complete this in a few minutes.