There are several good ideas already posted. I'm thinking;

Wetworks - show characters doing their job. SHOULD NOT BE GRAPHIC.
Waiting - characters doing what soldier do, wait. On guard but not active.
Caring for the wounded - characters from any side taking care of their or enemy wounded.
CQB - Show the less martial arts oriented fighting in close quarters.
Unique weapons - showcase the characters with the more unique and unconventional weapons.

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