[/quote]
Correct

. . . I read that book by Charlie Beckwith, it was a very good read. But aren't Deltas special in counter-terrorism and hostage situations? Not necessarily open warfare? I mean they did do a good amount of combat during Vietnam though. And they are always part of the US military operations - Afghanistan and Iraq.
So, I think maybe SAS is more direct counter-part of the Army Special Forces - aka Green Berets?[/quote]
Not only hostage rescue and CT.
For example in the first Gulf War they did SR - special reconoissance.
It was a big issue with the Scuds fired at Israel, so Gen Schwartzkopf decided to send to boys in.
So they "divided" the Scud Box in 2 areas : Scud alley - for the area where the SAS operated, and Delta went to the Scud Boulevard near the town of Al Qaim.
AFAIK as I know they had fun : on one occasion a on foot patrol was chased by a few armoured vehicles but some Strike eagke had it`s share of fun with the iraqis, on another one they were attacked by some helo`s but again the Eagles saved the day.