The cause of this strike was pretty much the kind of thing that causes most strikes. It had to do with wages, working conditions, and the right to form a union.
The strike was broken by Governor Calvin Coolidge who did so mostly by firing most of the force and by hiring new police. He rubbed salt in the wounds of the fired police by giving the new officers the higher wages and better conditions that the strikers wanted.
The public was, for the most part, not happy about this strike because it led to a great deal of crime during the time when the police were refusing to work.