For the first time, the Call of Duty: Warzone, Black Ops, Zombies and Modern Warfare storylines are all connected

For the first time, Call of Duty’s four main storylines are all connected.

It means the worlds of Warzone, Modern Warfare, Black Ops and Zombies appear canon within a single universe.

THERE MAY BE BLACK OPS COLD WAR SPOILERS AHEAD.

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