In Bolivia, a revolutionary workers’ and peasants’ uprise developed from 1969-70, which led to the emergence of the Popular Assembly in 1970. The military coup attempts of Miranda first and Hugo Banzer later were defeated with the mobilization. Finally, in August 1971, Banzer’s second military coup was victorious, establishing a bloody dictatorship. A few months later, from exile in Chile, various political organizations formed the FRA (Revolutionary Anti-Imperialist Front). We reproduce a letter by Nahuel Moreno arguing with the policy of Bolivian Guillermo Lora and Argentine Jorge Altamira of supporting FRA.