Special Forces Berlin: Clandestine Cold War Operations of the US Army's Elite, 1956-1990
For 34 years, basically the entire Cold War, the Army had a clandestine SF presence in West Berlin, which was designed to do direct action raids behind Soviet lines after the presumed fall of West Berlin in WWIII, then spread out to try to arm and train a resistance movement while all hell was raining down on the Fulda Gap. This book is a history of the unit written by a two-time veteran of it, with as much remaining information as he could scrape together and get past the government's classification review. It's interesting to see some of the outlines of how modern SOF came to be, especially the tension between the unit's supposed UW mission when the balloon went up and all the stuff they ended up getting roped into doing while waiting for that balloon that (thankfully) never went up. I'm also a bit amused that the whole section that tries to speculate on whether their core UW mission actually would have worked boils down to "well, we don't know, because the plans were dependent on stuff getting run by CIA, and the CIA claimed they'd give us the details only if the war kicked off, so we don't know if they were good to go or totally full of shit."
There were actually two units involved. Up until the 80s, Detachment "A" of the 6th Infantry Division was the cover name for the unit whose formerly-classified actual name was 39th Special Forces Detachment. A unit commander wasn't happy with his OPSEC situation, had a formal review done, and the powers that be decided to disband that unit and stand up another under deeper cover as MPs, which sort of worked, with some drawbacks. That unit watched the wall fall, and was disbanded when the unification treaty banned foreign forces from Germany unless they were agreed upon. The powers that be decided not to declassify it at that time, but just make it vanish.
Some interesting stories about the shenanigans that would go on as the SF operators tried to case the forces of the NVA and GSFG, develop their plans, and practice tradecraft. Trouble is, they didn't officially exist, so they'd occasionally get sideways with the West German authorities, or the conventional Allied forces, being as they were a bunch of military-aged men in civvies doing squirrely shit. Some of the results read like something straight out of Tom Clancy, or occasionally a Hollywood comedy. Also, they had to deal with varying levels of support from Big Army, some of whom was flat-out hostile to the very idea of SOF in the first place, or couldn't be bothered to learn how to employ it properly. Interesting to read about the growth of the counterterrorist mission set, and how the Berlin units interfaced with other units who would come later.
There's some hair-raising stories about the unit's involvement in the Military Liaison Missions, where under the Potsdam Agreement, designated Allied forces could drive around the East and vice versa. Basically legalized espionage, and the stories describe some real Wild West shit on both sides. Including some serious US-Soviet tensions after a US Major was shot and killed by a Soviet sergeant in the 80s.
I do wonder if there was some disagreement between government reviewers and the author about whether to redact certain stuff in the book. It's the only time I've read a book like this where the text flat-out says things like "so-and-so interfaced with [redacted]," or just has "[redacted]" in place of a whole paragraph or series of paragraphs. I wonder if that was the editorial comment of someone in the process saying "OK, douche, I'll take this out to stay out of trouble, but you're being really anal here."