Can you disclose information you have learned to the manufacturers opposition in your area?
your firm is one of six under considerations by a manufacturer planning to introduce a new service in your area. You are given confidential information to the service and the plans of the company. You are aware that the company will face severe oppositions from certain groups and politicians and that tyhe job will entail overcoming this resistance. Your firn is tuned down by your company and the assignment is given to a competitor
You answered the question yourself... you said, '... you were given CONFIDENTIAL information...'. It would be unethical to disclose the information because it was given to you in confidence and you were aware it was confidential.
That's not a good idea if you ever want to work again in your field. That is totally unethical and potentially illegal. Depending on the nature of the business you do, you could get sued or even arrested.
I believe (if I understand your question correctly) that is considered grounds for legal prosecution, or at least termination by your employer. It's usually called releasing pertinent information or 'trade secrets'.