The Partit Catala Proletari
was a left-wing political party in Catalonia. In July 1936 its leaders
agreed to join with the Socialist Party
(PSOE) and the Communist Party (PCE)
to form the Partit
Socialista Unificad de Catalunya (PSUC). Members also came from
the Union General de Trabajadores (UGT). Juan
Comorera was
elected general secretary of the PSUC. By the middle of 1937 the PSUC
claimed to have a membership of 50,000.

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