Go through the US border. You'll find out. Even if you are a US citizen. I got thrown on something like this almost a decade ago when I fought alongside the YPG, a US backed Kurdish militia that fought against literal ISIS.
DHS/CBP put me on some fucked up list and now everytime I re-enter the US I get detained, accused of crimes, tossed in holding cell. Last time it was 16 hours and they involuntarily took me to two hospitals, got a warrant to "internally search me" (anally), and drove me 60 miles to two different hospitals against my will while chained and cuffed while being accused of being a smuggler with no basis whatsoever. Later the hospitals sent me the bill, even though I never consented to anything, and there was no true medical reason for being dragged to the hospitals against my will, and despite DHS/CBP lying and saying they would pay for the hospital bills. I also filed complaints with the board for the medical professionals, and of course was told that a nurse can perform a law enforcement "search" without consent even without a warrant (the warrant was actually not served until after I went through the hospitals) and without even a court order or even being arrested (I wasn't arrested).
Yes that's right, the Arizona nursing board says nurses can act as sworn law enforcement and can search you without even a warrant or probable cause and even if you never consent to any medical care or even being touched, and that they can provide medical care against your consent even if it's not an emergency and without a court order or warrant and without you even having been arrested. DHS has taken profit off of this opinion and now uses nurses to search people on their list without having to get their own hands dirty and minimize their own constitutional limitations.
Let me count a few other occasions. Another time I was told I would never be allowed to re-enter the US; yes that as a US citizen I could not enter the United States. On yet another occasion I was told my passport would be cancelled, even though there's no real legal mechanism for them to do that. You can imagine what it's like to smile and nod your head while being told these wild lies by officers who may even be poorly trained enough to believe this themselves. It's always 4+ hours of detainment to cross a border along with intense attempted interrogation by DHS/HSI detectives. Ah yes, I've been fingerprinted and "booked" by DHS as well, on what basis I don't understand, even without being arrested.
I have never been charged of any crimes, I have no criminal record, and in fact the only thing I did "wrong" was help protect people from actual terrorists.
So yeah, if you want to find out. Jus cross the border, turn around and come back. You'll find out quite agressively.