I’m always looking for ways to stop soldiers from having to actually fight each other.
One reason for British Guards regiments wearing tall Bearskins in the past was to intimidate the enemy into running away from these apparent giants (with their eyes effectively hidden).
Today’s invention updates this approach by equipping helmets with an e-ink display.
The wearer would have a facemask attached to the helmet, to hide his own (probably fearful) features.
The e-ink display would be capable of switching on suddenly and portraying ghoulish, animated faces at a height in excess of that of normal people.
When well-designed, this would have a suitably disconcerting effect on the opposition.