Hi there, Rebecca Norman. Thanks for the informative reply. My intent for a wall like this actually does fall in line with the idea of fortification. The intent was not as part of a inhabited building per se, but as a perimeter wall around a living complex, such as a Roman courtyard villa, or that of Chinese/Japanese Siheyuan home complex.
I'm looking at property in the NE of Minnesota, which means a large, steady supply of wood is easily accessible.
For the earth mix, I was only thinking along the lines of the mix typically used in un-stabilized compressed earth blocks. The "toothpaste" analogy certainly makes sense though.
I was thinking the wall would be daubed after construction.
This is all brainstorming and research at this point for me.