At 4:05 p.m., the Banging Brood began with a few light thumps. This grew both louder and longer until about 4:10 p.m., when it ended.
Now as far as this "truce", what I haven't mentioned yet is that their mother came over on Tuesday evening and offered me a truce. She seemed shifty-eyed and a bit deceitful, especially when she tried excusing the wall punching as "noise from a fan". Funny, I don't recall fans ever learning how to walk on their own, or beat on a wall to retaliate for normal noises I'm making.
Needless to say, it's been rather quiet around here up until a few minutes ago.