The 1939 invasion of Poland is generally seen as the beginning of the second world war. An enduring image of that battle is of Polish lancers bravely but hopelessly charging German tank formations, getting cut to pieces. But that story, like so many in the popular mindset, is false, and the true story is somewhat different, but no less interesting.
The first class of nuclear submarines were a learning experience for the Soviet Navy. The November class boats experienced numerous difficulties and accidents, culminating in what has been described as a potential “Underwater Chernobyl."