Examining the history of the Communist Party in Spain (or PCE) from the end of the Spanish Civil War through its legalization on the so-called “red†Holy Saturday of 1977, this study explores the ways in which the activities of opposition groups—and of the PCE, the anti-Franco party par excellence, in particular—helped erode the economic, political, and social foundations of the regime, changing the attitudes of the citizenry until they were fundamentally at odds with an authoritarian government. The book also explains the relationship between the PCE and the Workers’ Commissions, Spain’s largest trade union, detailing how the two organizations were the principle driving forces—one political, the other unionized—behind the struggle against the dictatorship. Students of Spanish and political history will find this an expert and essential reference.