One decision. Millions of lives. In 1983, Soviet officer Stanislav Petrov faced a moment that could have changed history forever. When warning systems reported an incoming U.S. nuclear attack, he chose to trust his instincts instead of the computers.

Hitler surrounded Switzerland during WWII… but never invaded. Why? 🇨🇭 By 1940, Nazi Germany had conquered most of Europe — yet tiny Switzerland sat untouched in the middle of it all. Was it the Alps? The 850,000 troops ready to fight? Operation Tannenbaum that never launched? Or something else entirely? Historians still can’t fully agree.…