I liked it; one of the grittiest TV shows on at the time (Southland is the only other comparable show, and The Unit was less gritty than Southland).
About the hidden Delta Force team of Four "Sergeants" in the US Army that comprised The Unit, which did covert operations in foreign countries "under the radar".
The soldiers (4 men and 1 woman) were never referred to by their real names; their code names were:
Snake Doctor,
Dirk Diver,
Betty Blue,
Whiplash,
and Red Cap (the girl).