The Ops in Black Ops stands for operation. A unit would be put together for a black mission and would likely remain a unit only as long as a mission lasted.The whole purpose of the unit is to not be known. Personnel would be drawn to form a unit for a mission and before that it would consist only of the upper level staff needed to create and insure funding, training. logistics for the mission that has been determined must remain secret and hidden. If the unit was known and it's personnel able to be identified then it would have reduced capabilities and not be as effective. They could also be called in front of a congressional hearing. Delta Force is as close as you might get to an answer. They are likely to be some of the military personnel chosen to be detached and form the unit.
Assuming you are asking about the US Army, the closest thing to a "black ops unit" is the 1st Special Forces Operational Detachment - Delta (1st SFOD-D), more commonly known as the "Delta Force." Black operations are called Black operations because of the ops they do. Specialized units mostly formed per operation. Black as in "not standard military". So are there known Black ops units. I don't think so.
"Black" may be used as a generic term for any activity that is hidden or secret. For example, some activities by military and Intel agencies are funded by a classified "black budget,"
"Black Ops" is not a unit, it is a term used for describing operatives who "go ghost" (the name comes from the fact that they have their faces blanked out, and in their file all top secret/black ops information is blacked out with a permanent pen. You generally go from a unit like the seals or the marines into "black ops".
black as many helicopters in armys have black helicopter
In the US Military Delta Force were the only unit who condicted Black operations. Then SEAL Team 6 joined them later when they were created.
I have black ops and MW3 but I find MW3 to be better but you do get bored of it as you do with black ops but I recommend MW3 but black ops is fine.
Yes.
Black Ops
black ops is brill and can not be better .
you can't get a nuke in black ops
MW3 is after COD black ops.
Black ops
Black Ops 2 Zombies is harder but also way funner than Black Ops Zombies.
from my readings i have found Black ops to be more unannounced so my answer would be Black ops google it if u need to