The official Call of Duty website has just been updated with a new audio file for Call of Duty: Infinite Warfare. The video is called KNOW YOUR ENEMY: https://www.youtube.com/watch?v=gaDJX0Ttsfc In addition to this, Call of Duty is live streaming the teaser on Twitch, with a SDFBot posting in the chat. SDF appears to stand for Settlement Defense Front. The SDFBot posted two quotes thus far: “We are the Settlement Defense Front. You answer to us.” “Our blood boils, and so too shall your oceans.” “Our destruction will be final. You will watch as the walls around you crumble.” “You will know loss, and you will be left with nothing. We are in power now.” source:charlieintel