The Congress proved to be an important turning point for the Cuban delegates. By including women representatives of various political currents, especially from the revolutionary movement and the old Communist Party, it facilitated the construction of new alliances within Cuba’s revolutionary coalition just as the Cuban revolution entered a more radical phase. The Congress encouraged engagement with progressive women’s groups throughout Latin America, giving the Cuban delegates a comparative, continental perspective on women’s issues and creating an incipient network of radical women across Latin America. The conflict and controversy surrounding the Congress also sharpened battle lines between Catholic and Communist women activists and between the Cuban Revolution and the United States. This presentation will use the little-known 1959 Congress of Latin American Women as a prism through which to examine the transnational currents of feminism, Communism, Catholicism and radical nationalism that overlapped and clashed in the Cuban Revolution and in Cold War Latin America.