stampact Target for the Sons of Liberty Statute opposed by the Sons of Liberty Cause of colonists' concern in 1765 British Parliament outrage of 1765 British law opposed by colonies Boston Tea Party impetus 1765 statute imposing a tax on printed documents 1765 law that made colonists go postal Cause of colonial unrest The Sons of Liberty opposed it Quickly repealed statute Anathema to Sam Adams The Sons of Liberty oppos Tax bill imposed on the American colonies Short-lived 1765 statute Boston Tea Party catalyst