What tools did management use against the labor unions?

Management often used various tools against labor unions, including legal measures such as injunctions to limit union activities and strike actions. They also employed tactics like hiring strikebreakers or "scabs" to undermine union strikes and maintain operations. Additionally, management might engage in aggressive anti-union campaigns, utilizing Propaganda to sway public opinion and influence employees against unionization efforts. Lastly, they could also implement surveillance and intimidation tactics to discourage union organizing.