A massive land-seizure movement first erupted in Peru in 1958 and spread across the Andean highlands in 1963-1964. Several hundred peasant communities in the Peruvian Andes occupied neighboring haciendas in an attempt to retake lands they felt had been stolen from them over the years. Hacienda peasants also participated in this movement, forming peasant sindicatos (unions) to improve their labor conditions.

The land-seizure movement brought with it an upsurge in community political mobilization. Throughout the highlands, village leaders banded together in regional federations,...