Most employees are reluctant to make waves specifically because of the fear of backlash. Some employers take advantage of this, keeping workers under their thumb with threats and following through to retaliate against those who do cry foul.
Wrongful termination is a general term that is used for any illegal termination. Many terminations may be morally or ethically wrong but not illegal. You should have a board certified employment lawyer review your case to see if your wrongful termination was in illegal termination.