Know Your History Warzone: New Call of Duty Teaser Discovered
By Andrew Lin

Know Your History Warzone is an in-game teaser you might have discovered while playing on Verdansk. The teaser will appear with some static briefly before returning to normal.
Know Your History Warzone: New Call of Duty Teaser Discovered
Cod 2020 teaser in warzone!!! Full clip!!!! @PrestigeIsKey @NICKMERCS @timthetatman @drdisrespect @InfinityWard @CallofDuty @charlieINTEL @Swagg #CallofDuty #CoD2020 #CallofDutyModernWarfare #Warzone @RavenSoftware @Treyarch pic.twitter.com/K36EMaNirH
— NutterButterAF (@NutterButterAF) August 7, 2020
If you pause the message, it says "Know your history" in English and "Doomed to repeat" in Russian. It flickers momentarily before returning back to your normal scheduled gameplay.
The choice of English and Russian heavily implies some sort of Cold War-related event in Warzone to drum up hype for the much anticipated next main series Call of Duty title. The television static that accompanies the message seems like a nod to subliminal messaging, a trope made popular by science-fiction Cold War cinema.
2020's Call of Duty is rumored to take place during the Cold War, titled Black Ops: Cold War. Warzone will tie into the Cold War in some way, as it was previously stated that Warzone is its own game, separate from Modern Warfare 2019.
We're finally getting official teasers for the long awaited Black Ops: Cold War, so it shouldn't be too long until we get some concrete information about the game or how Warzone will be tied into it.