The history of US foreign policy, especially after World War II, is pretty much defined by the subversion and overthrow of foreign regimes, including parliamentary regimes, and the resort to violence to destroy popular organizations that might offer the majority of the population an opportunity to enter the political arena.
Following the Second World War, the United States was committed to restoring the traditional conservative order. To achieve this aim, it was necessary to destroy the anti-fascist resistance, often in favor of Nazi and fascist collaborators, to weaken unions and other popular organizations, and to block the threat of radical democracy and social reform, which were live options under the conditions of the time. These policies were pursued worldwide: in Asia, including South Korea, the Philippines, Thailand, Indochina and crucially, Japan; in Europe, including Greece, Italy, France and crucially, Germany; in Latin America, including what the CIA took to be the most severe threats at the time, “radical nationalism” in Guatemala and Bolivia.
Sometimes the task required considerable brutality. In South Korea, about 100,000 people were killed in the late 1940s by security forces installed and directed by the United States. This was before the Korean war, which Jon Halliday and Bruce Cumings describe as “in essence” a phase — marked by massive outside intervention — in “a civil war fought between two domestic forces: a revolutionary nationalist movement, which had its roots in tough anti-colonial struggle, and a conservative movement tied to the status quo, especially to an unequal land system,” restored to power under the US occupation. In Greece in the same years, hundreds of thousands were killed, tortured, imprisoned or expelled in the course of a counterinsurgency operation, organized and directed by the United States, which restored traditional elites to power, including Nazi collaborators, and suppressed the peasant- and worker-based communist-led forces that had fought the Nazis. In the industrial societies, the same essential goals were realized, but by less violent means.