I was watching Extra Credits’ YouTube video on the Christmas truce during World War 1, and he mentioned that even in the time leading up to that event, there were some instances where guard patrols would look the other way and not shoot every once in a while if they saw an enemy soldier out of their trench.

How common did this type of thing happen, and does anyone know of any sources I could check out about this? I’ve recently become a lot more interested in the ways enemy soldiers may have interacted with each other apart from all the violence all of us already know about.