Manchurian Farm Fraud

When taking over an army, you will need two things.

You need a manifest, of terms, "codes", related to numbers, "units", on your farm's hectare scale (the times, years, rotation, grids, and numbers of crops).

Put that in a book, with your copy, featuring tasteful pornography, to look at, while giving speeches.

If someone looks in your copy, the real copy's holders, will kill them.