NATO nearly caused nuclear war while unaware its exercise existed

Evidence

As suddenly as the buildup started, it ended. Leaders came out of their bunkers, and bases resumed normal activity. NATO hadn’t actually been at DEFCON 1. They’d been conducting a military exercise—a simulated state of nuclear attack—called Operation Able Archer 83. The United States had launched a massive, coordinated, military “dry run” of a full nuclear first strike. They just hadn’t bothered to tell the Soviets, and nobody realized they nearly precipitated Armageddon. The most horrifying fact of the Able Archer 83 crisis was that NATO wasn’t even aware it existed. — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 588

Categorization

• SEED: Essay angle: unintended escalation from cross-signal misreading — the 1983 crisis as a case study in how signaling failures, not intentions, drive conflict.