Urban insurgency has been used with increasing frequency and effectiveness in many areas of the developed and less developed world during the past decade. In Latin America, this trend toward expanded urban guerrilla warfare has been most pronounced in Brazil, Uruguay, and Argentina. In the three nations, revolutionary forces have rejected completely the concept of the primacy of guerrilla activities based in the countryside, a theory adapted to the Latin American environment by Cuba's Ernesto “Che” Guevara and French Marxist Régis Debray. Instead, attention has been focused on organizing and developing guerrilla and terrorist operations in such population centers as Rio de Janeiro, São Paulo, Montevideo, Buenos Aires, Rosario, and Córdoba. (For a discussion of factors leading to the development of urban insurgency in Latin America see “The Urban Guerrilla in Latin America: A Select Bibliography,” LARR: 9: 1).