This article reveals the influence of the Spanish Civil War (1936–9) on both the reformers of Guatemala's ‘Revolutionary Spring’ (1944–54) and the reactionaries who overthrew Jacobo Arbenz in 1954. It shows how officials in the Arévalo and Arbenz administrations looked to the defeated Second Spanish Republic as a moral and political example, while local opponents of those administrations treated Spain's Nationalist insurgency and Francisco Franco's dictatorship as models for how to exterminate communism. In so doing, the article argues for the importance of multi-sited transnational Cold War histories that complement existing studies of US intervention.