If you have an employment contract (including a union or collective bargaining agreement) which limits the reasons for termination and/or sets forth a certain process for termination, and you were fired not in accordance with that contract, you would have a claim for illegal termination. Unfortunately, if you did not have an employment contract, you would have been an "employee at will." An employee at will may be fired at any time, for any reason--including reasons that are incorrect or mistaken. Thereforefore, unless you had an employment contract, you employer could almost certainly terminate you, even if the shipping was in fact authorized.