Interesting!
Thanks for the link
I still vote for “blockhouse” - 22 inch thick walls was serious work
I remember them building a plaza near me....8" concrete block walls....it was about 10 ft. high at the time. They had it braced with 2 by 4's...It fell over....because it was a bit off balance.
The weight of a 22 inch wall.....that will shift only when the ground shifts.