FOM was founded on June 11, 1911, after a number of organizational attempts by socialists, anarchists and mutualist workers, of multinational origin[1] It was linked to the Federación Obrera de Chile (FOCH).
[6] In May 1913 a number of articles with syndicalist orientation were published in the FOM press, indicating the existence of a libertarian wing inside the movement.
[2] Having been able to build up a strong strike fund, FOM could pressure companies to accept collective bargaining agreements and cash wage-payments for workers.
[2] In the midst of the patriotic fervour of the 'Don Ladislao War' in July 1920, conservative sectors sought to counter the influence of FOM.
[2] No local newspapers were published for three days, and when they resumed publication, they had been instructed not to mention the deadly arson attack.
[4] In 1927 Sindicato Profesional de la Industria Ganadera y Frigorífica was founded in Punta Arenas as a continuation of FOM.