Let's teach you something about military cam paint, as it keeps haunting this. It's not blackface, this is why:

The first target is to break the highlights of your face up, cheekbones, nose, chinline - Shine.
Next, not to cover the entire face, but to stripe it to break up the - Shape.
Then, add other stuff to break up the edges - Silhouette.
Finally, put shadow where it shouldn't be, so they don't see what they are looking for - your eyes - Shadow.
I've had someone looking for me walk straight past a foot away. It works.

So the cam paint is not blackface either. It's streaks, often particolour, and fits with other stuff, veils and scrim. Why did Elizabeth 'Arden? Max Factor.