On 27 October 1962, Vasili Alexandrovich Arkhipov was on board the Soviet submarine B-59 near Cuba when the US forces began dropping non-lethal depth charges. While the action was designed to encourage the Soviet submarines to surface, the crew of B-59 had been incommunicado and so were unaware of the intention. They thought they were witnessing the beginning of a third world war.
Trapped in the sweltering submarine – the air-conditioning was no longer working – the crew feared death. But, unknown to the US forces, they had a special weapon in their arsenal: a ten kilotonne nuclear torpedo. What’s more, the officers had permission to launch it without waiting for approval from Moscow.
https://www.theguardian.com/science...ut&utm_term=249823&subid=24323175&CMP=ema_632