# 1953 Iranian Coup On August 19, 1953 (28 Mordad in the Iranian calendar), the United States [[CIA]] and Britain's MI6 orchestrated the overthrow of Iran's democratically elected prime minister, [[Mohammad Mosaddegh]]. Code-named **Operation Ajax** (TPAJAX in CIA files) and run on the ground by [[Kermit Roosevelt Jr.]], it is the single most consequential event in the modern US-Iran relationship — and the founding case study of American covert regime change. ## What Happened Mosaddegh had nationalized the Anglo-Iranian Oil Company (today's BP) in 1951, ending a half-century of British control over Iran's oil. Britain, unable to reverse it militarily, persuaded the new [[Dwight D. Eisenhower]] administration that Mosaddegh was steering Iran toward the Soviet-aligned [[Tudeh Party]] and communism — a Cold War framing that overrode the reality that Mosaddegh was a secular nationalist with no love for Moscow. The CIA spent roughly $1 million on bribed politicians, paid mobs, fabricated newspaper stories, and an officer corps willing to move against the government. After a first attempt failed and [[Mohammad Reza Pahlavi]] briefly fled the country, a second push on August 19 succeeded: Mosaddegh was arrested, the Shah returned, and royal dictatorship was restored. ## Why the United States Did It The publicly stated rationale was anti-communism; the operative motive was oil and Cold War control of the Gulf. The settlement that followed handed a 40% share of Iranian oil to American companies — Iran's nationalization was nominally preserved but its substance reversed. The coup secured Western energy access for a generation and made Iran a pillar of US Cold War strategy. ## Why It Matters The 1953 coup is the original template for [[CIA]] covert regime change, directly preceding operations in Guatemala (1954), Chile, and beyond, and it became a textbook application of [[Covert Action Doctrine]]. For Iranians it is the foundational grievance: when revolutionaries stormed the US embassy in 1979 (the [[Iran Hostage Crisis]]), they explicitly feared a repeat of 1953 — a CIA-engineered restoration of the Shah. Every "Death to America" chant runs back through this event. For the vault, 1953 is the headwaters of the [[Iranian Revolution]] and everything downstream: the hostage crisis, the [[Iran-Contra Affair]], [[Maximum Pressure]], and ultimately the [[Iran War 2026]]. It is the clearest demonstration of **blowback** — the idea that covert interventions generate the very enemies they are later sold as containing. The US government denied any role for decades; the CIA only formally acknowledged it in 2013, and released more documents in 2017. ## Analytical Framework The coup sits at the intersection of three vault patterns: the [[CIA]]'s institutional preference for covert action over accountability; the way Cold War anti-communism laundered resource-control motives into moral crusades; and the long-fuse dynamic by which "successful" interventions detonate a generation later. It is the indispensable prologue to any honest account of why Iran and the United States are at war. *See also: [[Iranian History Hub]], [[Mohammad Mosaddegh]], [[Iranian Revolution]], [[Iran-Contra to Iran War Pipeline]]*