Hats off to Eurogamer for discovering this and the video above of a player who charmingly describes the event as "very strange." Players of Call of Duty: Warzone will now see a short message "KNOW YOUR HISTORY" during matches is now displayed.

All players in the group will see this message at the same time, and depending on whether they are in the middle of downtime or under fire, it will either be a fun teaser or an irritating distraction.

Taylor Kurosaki, Narrative Director at Infinity Ward, suggests that Warzone will be a constant for Call of Duty in the future, and even if other games in the series follow suit, "Call of Duty is a genre unto itself. Warzone will be the through-line connecting all of Call of Duty's various sub-franchises."

The next Call of Duty mainline game is called Black Ops: Cold War, a fact confirmed by Doritos promotion, and is being made by Treyarch and Raven. What is known about Black Ops: Cold War is as follows.