There is a fog that sits over most things that obscures our vision from the truth, from reality. In war, it’s been labelled as the Fog of War. It was first referred to by Carl von Clausewitz, the Prussian military analyst, as “twilight” or “moonlight”, but both similar metaphors to fog.
It’s the uncertainty in combat zones soldiers face, where their situational awareness is tested. Where what you thought was right might not be right, or what you thought was wrong…wasn’t.