Are Call of Duty Black Ops and Modern Warfare in the same universe?

A Popular Perk From Black Ops Universe Has Been Confirmed for Call of Duty: Modern Warfare 3 Zombies! - EssentiallySports

10 Best Call Of Duty Games Of All Time You Should Play

Call of Duty®: Next: Call of Duty®: Modern Warfare® II Multiplayer Brings the deepest, most innovative MP experience yet

Announcing Call of Duty®: Modern Warfare® II

Modern Warfare 3 Zombies teaser hints at ties with Black Ops Cold War universe

ModernWarzone on X: If Activision goes after @PlutoniumMod next then there will be no safe way to play Black Ops 1, Black Ops 2, Modern Warfare 3 or World at War online

Call of Duty Launch Showdown: Modern Warfare vs. Black Ops 4 - Hardcore Gamer

Are all CoD campaigns in the same universe?

BLACK OPS COLD WAR & MODERN WARFARE IN THE SAME CALL OF DUTY UNIVERSE