Evaluating the Extent of United States Involvement in the Success of the 1964 Brazilian Coup d'état

This essay investigates the extent to which United States involvement contributed to the success of the 1964 Brazilian Coup d'état. Using a historiographical approach, the author synthesizes primary declassified U.S. government documents with diverse secondary perspectives from various historians.

The argument evaluates three distinct viewpoints: the impact of direct military and intelligence support (Operation Brother Sam), the significance of domestic anti-communist sentiment, and the role of long-term U.S. financial and military influence in the years preceding the coup. The paper demonstrates analytical strength through a nuanced evaluation of counter-arguments, specifically weighing the effectiveness of U.S. contingency plans against the reality of their tactical inaction during the actual takeover.