Friend or Foe?/Playing With

Basic Trope: Characters in a conflict can't tell who's on their side.

Straight: Characters shoot at, or avoid, their own friends.
Exaggerated: Characters shoot everything that moves even though they know they have friends about.
Justified: As in Real Life, the Fog of War can make it very hard to tell.
Inverted: The Medic with the Healing Shiv wants to shoot only his friends, but finds it hard to tell which ones.
Subverted: Uniforms make it clear.
Double Subverted: Until Dressing as the Enemy occurs.
Parodied: Characters are baffled in a paintball fight -- where the balls shoot Instant Allegiance Artifact.
Deconstructed: The characters have been rendered so paranoid by war that they can't tell who is who anymore.
Reconstructed: That's because of how hard it is to detect.
Zig Zagged: ???
Averted: Friendly Fireproof
Enforced: "We don't want to glamorize war, so let's depict battles as gritty, confusing scenes where the hero can't even recognize his best friends."
Lampshaded: A character asks "Why Don't Ya Just Shoot Him"
Invoked: One character is The Mole, who takes advantage of the confusion of battle to murder a target.
Defied: ???
Discussed: ???
Conversed: ???

Back to Friend or Foe, scumbag! Or I'll-oh! Sorry, sir! Thought you were one of them, y'see..