This article deals with the politics of Peruvian rural electrification during the Cold War years. In 1964, the inhabitants of the Mantaro Valley established the Cooperativa Eléctrica Comunal del Centro Ltda. 127, with the help of the central government and American aid agencies in the context of the Alliance for Progress. At first, this rural electric cooperative was seen as a legitimate way to channel traditional communal practices through an institution that was seen as modern, capitalist, and Western. However, in the fluid context of Peru's Cold War, electric cooperative development quickly became a heated political battleground. After a “revolutionary” military regime took power in 1968, the armed forces eventually defined the cooperative as an obsolete institution and quickly adopted their own cooperative model, free from any capitalist “vices,” as they sought to implement their own “revolution from above.” While the Cooperativa Eléctrica Comunal del Centro represented a successful combination of local discourse, foreign aid, and modern technology, its history also shines a light on the volatile politics of infrastructural development: as its political and economic meaning changed wildly as different political regimes oversaw its expansion and eventual downfall.