This paper analyses the attempts of the Spanish state to regulate industrial relations in the early 20th century. The main conflict being over union recognition, workers faced strong opposition from employers, which generated a situation in which all possible agreements to end strikes were unstable. Faced with an increasingly active labour movement, the state tried to regulate industrial conflict but hesitated to apply state authority to force recalcitrant employers to recognize unions. A transitory system was in place for more than 20 years in which the state and employers clashed over the issue of the freedom to work and the state selectively applied its coercive power to force employers to give up on some of the strikers' demands. Tracing the role of authorities in strikes, I show how the intervention of state officials in strikes granted workers at least the partial satisfaction of their demands. I finally argue that state intervention in industrial conflict fuelled the radicalism of both unions and employers' associations.