[jessriedel]

Duels have to be with deadly weapons. (See the dictionary.) If you are purposely using them in a manner that cannot result in death, they aren't deadly, so it's not a duel. Otherwise every boxing or fencing match would be a duel.

That is different than using deadly weapons but where one party is incapacitated or surrenders before they are killed. The realistic threat of death is still present.

The whole point of the top-level comment was that it seems shocking that dueling was still happening mid-20th century, so it is useful to point out that this was not the normal definition of dueling.