Off the top of my head commentary. Really not enough data to be too specific.
Most Os are taught that you should avoid getting in situations with enlisted that may become physical. that's nice in theory but can be dificult in parctice. And it can get really tough in a Reserve Unit situation. That said both are old enough and have rank and time in enough that they should know better than to get in a fracas at a bar. Both should Know better than to be getting so drunk as to lose control. One or the other should have walked away much before it got to that point.
Both may get Art 15 Captains Masts, the E-6 may easily have violated Articles 88 and 89, and could easily be facing a Court.
And if the Command ignores it, not only does it ruin credibility, but leads to further in discipline, if you didn't punish them for that, how can you punich me for something less? etc etc. So the Command is almost bound to pursue it as a serious matter.
IIRC you are in a Naval Air Reserve situation and that really muddies the waters as the line as to when the UCMJ applies and what articles may be applicable during drills, ATs etc.
They both fucked up good and probably at the minimum will be retiring at their current ranks.