Lost World 1962

In lost World 1962, during the cuban missile crisis, a nuclear submarine fired at the american navy believing  nuclear war started, this resulted in nuclear war (aka WW3) many nation were destroyed in it, the war lasted only 1 day, after the war, radiation from most of the north hemisphere, would leake into the southern killing more people, years after the war, survivor would come out of their bunker and repopulated the world, The US and the USSR survived the war (other nation like Australia and Canada also survived) soon faction pop up, in this Brave lost world,