The 1954 Guatemalan coup d'état (Spanish: Golpe de Estado en Guatemala de 1954) deposed the democratically elected Guatemalan president Jacobo Árbenz and marked the end of the Guatemalan Revolution. The coup installed the military dictatorship of Carlos Castillo Armas, the first in a series of U.S.-backed authoritarian rulers in Guatemala. The coup was precipitated by a CIA covert operation code-named PBSuccess.
The Guatemalan Revolution began in 1944, after a popular uprising toppled the military dictatorship of Jorge Ubico. Juan José Arévalo was elected president in Guatemala's first democratic election. He introduced a minimum wage and near-universal suffrage. Arévalo was succeeded in 1951 by Árbenz, who instituted land reforms which granted property to landless peasants. The Guatemalan Revolution was disliked by the U.S. federal government, which was predisposed during the Cold War to see it as communist. This perception grew after Árbenz had been elected and formally legalized the communist Guatemalan Party of Labour. The U.S. government feared that Guatemala's example could inspire nationalists wanting social reform throughout Latin America. The United Fruit Company (UFC), whose highly profitable business had been affected by the softening of exploitative labor practices in Guatemala, engaged in an influential lobbying campaign to persuade the U.S. to overthrow the Guatemalan government. U.S. president Harry S. Truman authorized Operation PBFortune to topple Árbenz in 1952, which was a precursor to PBSuccess.