Following the outbreak of the Spanish Civil War, which Aldred proclaimed to be "the mighty proletarian movement that Europe needed", the USM once again saw a surge in activity. In August 1936 the USM founded the semi-weekly newspaper Regeneracion and began to hold frequent open-air meetings which, according to John Taylor Caldwell, "drew bigger crowds than at any time since the general strike". In a meeting on 11 August, the USM called on workers' organisations to convene meetings in solidarity with the Spanish Republicans and condemned Stanley Baldwin's National Government for not itself supporting the Spanish Republic.
Following the outbreak of the Spanish Civil War, Aldred proclaimed it "the mighty proletarian movement that Europe needed," leading to a surge in USM activity. The USM founded the semi-weekly newspaper Regeneracion and began holding frequent open-air meetings which drew larger crowds than at any time since the general strike. At a meeting on August 11th, the USM called on workers' organizations to convene meetings in solidarity with the Spanish Republicans and condemned Stanley Baldwin's National Government for not supporting the Spanish Republic.