War must be demoralizing with colour code uniforms or not. But have you seen the movie? They are fighting some fairly big green frogs or so. No guns allowed as far as I remember.

Also, you can differentiate without colour coding too like the seals vs delta or infantry vs flyboys in starship troopers. Unless you are able to use ESP! Do you want to know more?

There are so many sci-fi stories out there and we are circulating

But have we seen the evil universe invade this peaceful species in another part of the universe and in the end the hero of the peaceful kills all the humans with a massive stunt. Have we seen that before?