What forced the federal administrators into action during the birmingham crisis?

After the attacks, blacks in the area began to riot because of the police involvement and were repressed severely by the Birmingham Police Department. The United States government intervened with federal troops for the first time to control black violence. It was the first time the government had used military troops independently of enforcing a court injunction. This federal action was considered controversial by Governor Wallace and other Alabama whites. 

February 1848 is when it was added. if that's what you were asking