Operation Thirty Hours
Operation Thirty Hours was a Brazilian military plan to invade Uruguay in 1971. Brazil was under a military dictatorship, governed by Emílio Garrastazu Médici. During that time Uruguay was in an electoral process and the possibility of victory by the left-wing Frente Amplio frightened both the Brazilian rulers and the Tupamaros, an Uruguayan urban guerrilla group. However, the Broad Front was defeated at the polls and the plan was cancelled.