I’m currently reading FM 2-15, April 1941.
A US Army manual that is quite possibly the last, and certainly one of the final manuals devoted to horse cavalry in depth. It’s interesting to see the ultimate expression of a soon-to-be-obsolete practice.
For all my knowledge, I still don’t have the full frame of mind to accurately synthesize it with both older horse and later motorized operations, but I can see the passing of an era nonetheless.
Horse cavalry in a mechanized age fits my love of oddball formations, which may be why I’m as interested in it as I’ve been.
The public-domain field manual can be accessed here