Hello! Sorry it is a bit late here so can't expand on them at all, but this is a topic I love and have written extensively on, so allow me to point you towards a few responses which might interest you.

This comment is about dueling in interwar Italy with a focus on the involvement of Olympic fencers.

This comment chain looks at both interwar Italy and Germany, with a slightly more poltical view on matters.

This lists several more which aren't directly on this period, but more general about dueling.

Happy to answer follow ups if you have any. But likely tomorrow.