My boss made me an army volunteer to clean the office kitchen.
army volunteer
idiomTo make someone perform a task or duty, especially one they are not prepared or willing to do.
When the manager asked for someone to work the weekend shift, he made me an army volunteer by assigning me the task without asking.
Although he had no interest in organizing the charity gala, he became an army volunteer when his supervisor unilaterally added his name to the planning committee.