They’re fencing without helmets. I’m surprised nobody lost an eyeball yet. Most likely that part of the rule.
This reminds me of why Nazi German's are often portrayed with some badass scars on their face; because they actually DID have badass scars on their face - but not for the reason you're likely thinking (war).
An oddity of German culture that has now fallen out of fashion was that they did fencing in their (upper-class) schools, however, they did so without masks (though they may have worn goggles if they so chose, and gear to protect their necks specifically). It was not only seen as a symbol of courage and pride to have a sick ass fencing scar on your face, but it also let everyone know that you are highly educated and wealthy (because you went to one of those rich kid schools).
They were such big status symbols, Germans would have scar themselves to fake a fencing scar.
Thus, why nazi Germans are often portrayed with sinister looking scars in media.
Also, german fencing was weird; they'd just wave their sword around like a whip, essentially cutting each-other up until one chickens out, or faints, or a winner was decided by a judge.