At the end ofthe First World War, collective action became intense, the CFTC was set up in 1919, trade union rights were extended and the first law on collective agreements was enacted in that year. ###>A l'issue de la première guerre mondiale, l'action collective devint intense, la CFTC naquit en 1919, le droit syndical fut étendu et la première loi sur les conventions collectives promulguée cette même année.