A few years ago, there was a youtube post, where two girls had a physical fight in the barracks. It was very apparent it was after lights were supposed to be out, because there were no drill instructors in sight. I seem to remember the fight was between a black girl and a white girl, but I could be wrong about that.
And just a year or two ago, there was another youtube post, featuring a great fight between two female soldiers. It wasn't a catfight, rather it was a fight during PT, or some type of warrior training. A drill instructor acted as referee. Even though it wasn't a real catfight, it was still an excellent test of strength between two female soldiers.