Robin Sage is a US Special Forces exercise that involves what is essentially LARP'ing and world-building (the fictional setting, "Pineland", is a thinly-veiled iteration of rural America). It's been held annually for the last 60 years or so.
A PDF on the modern relevancy of the exercise:
https://www.soc.mil/SWCS/SWmag/archi...bin%20Sage.pdf
An overview of this-year's exercise:
https://www.thedrive.com/the-war-zon...rfare-exercise
A critique of the world-building aspect of "Pineland":
https://smallwarsjournal.com/jrnl/ar...unconventional
Robin Sage could provide ammunition for Refs running a CONUS-set campaign, especially if the OPFOR is something like New America.
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