The general morale alters these figures - an especially poor morale could boost the last figure, for example.

The stress level and expectations should also be able to change the structure much.

Finally, it's been written in some sources that the 'cowards' or 'fragile' soldier are usually known in advance. A good roganization should therefore be able to almost eliminate the last fraction median problematic fights.


I recall much German writing on the subject, and it doesn't focus on percentages or such but on what the leaders should do.
The forming of small teams ("Kampfgemeinschaften" - combat collectives) as small as fire team or squad with very strong cohesion is one of the advised courses of action. This goes so far that WIA infantry in WW2 preferred to cure in their company instead of in a hospital, knowing that they would be cared for betterby their comrades.
This is strongly related to "Kameradschaftlichkeit" (conmradeship?).

The other advise is about the vertical relations; leader-troops.
The leaders should immerse into this Kameradschaftlichkeit to be accepted and respected (eating same food, no luxury, lead by example...) while still retaining the ability to be tough (~ sacrific men).

As I said; there's much about how to address the problem in German literature, but very little statistics (if any) about it itself.