In Tom Clancy’s Without Remorse (a “Jack Ryan Universe” book????), John Clark is the “hero” as he drifts a bit doing work for government using his SEAL skills. When he happens upon a lost woman, things begin to turn around until they spiral out of control. His loss becomes a call for revenge as he takes on criminals who act with impunity. This in the backdrop of continuing aggression by the Vietnamese (North) as this is set against the backdrop of the Vietnam War.
The criminal element, though brutal, finds it difficult to match the skill and patience of an experience “black” operative.