My 5 cups on:
> I thought about it. And what did the knights do when they suddenly chested their back?

As a person engaged in historical reconstruction of the period of the XIII-XIV centuries, I have experience of wearing armor and fighting in them. When you stand in the army and look at the enemy regime that has been damaged by the alabards, the suddenly chested back appears to be the least problem at the moment. In other words, you don’t even pay attention to such little things.