The 1953 CIA Coup Against Mossadegh (Operation Ajax)

Introduction

On August 19, 1953, Prime Minister Mohammad Mossadegh of Iran was overthrown in a coup d'état. The Shah, Mohammad Reza Pahlavi — who had fled Iran days earlier as a first coup attempt failed — returned to take full control. What followed was the consolidation of authoritarian rule under the Shah, the brutal expansion of his secret police (SAVAK), and a trajectory that culminated in the 1979 Islamic Revolution.

The CIA's role in the 1953 coup was an open secret for decades, acknowledged in outlines by scholars, journalists, and occasional official admissions. In 2013, the National Security Archive obtained a CIA internal history that stated unambiguously: "The military coup that overthrew Mossadegh and his National Front cabinet was carried out under CIA direction as an act of US foreign policy, conceived and approved at the highest levels of government." The document had been drafted in 1954 by Donald Wilber, one of the CIA officers who planned the operation.

Background: Mossadegh and Oil Nationalisation

Mohammad Mossadegh was a Swiss- and French-educated lawyer and politician from a wealthy Iranian family who rose to prominence as a nationalist figure. He was elected Prime Minister in 1951 on a platform centred on nationalising Iran's oil industry, which was then controlled almost entirely by the Anglo-Iranian Oil Company (AIOC) — a British-majority-owned firm whose 1933 concession allowed it to extract Iranian oil on terms widely regarded in Iran as exploitative.

Mossadegh's Majles (parliament) voted to nationalise the AIOC in March 1951; the Shah reluctantly appointed Mossadegh Prime Minister in April 1951. The nationalisation provoked immediate British fury. The British government imposed a worldwide embargo on Iranian oil, froze Iranian sterling assets, and appealed to the new Eisenhower administration (which took office in January 1953) to act against Mossadegh, whom they framed — with some exaggeration — as creating conditions for a Soviet takeover of Iran.

The British framing found receptive ears. CIA Director Allen Dulles and Secretary of State John Foster Dulles shared a Cold War worldview in which any left-leaning nationalist government in a strategically important country was a potential Soviet client. Kermit Roosevelt Jr., the CIA's Near East division chief, was assigned to plan and run the operation.

The Operation: Ajax and Boot

The joint CIA-MI6 operation was code-named Ajax on the American side and Boot on the British side. Planning and execution ran from early 1953 through the August coup. The documented operational elements include:

• Propaganda and black operations: CIA and MI6 operatives funded Iranian newspaper and radio coverage depicting Mossadegh as a communist sympathiser and a threat to Islam. The operation involved planting stories, funding opposition publicists, and coordinating with the Iranian press.
• Street agitation: CIA assets paid for hired crowds, organised demonstrations against Mossadegh, and in a documented element of the operation, paid people to pose as Mossadegh supporters committing violent acts (to discredit him). Kermit Roosevelt and later CIA officer Richard Cottam both described these operations.
• Clerical mobilisation: the CIA made contact with conservative Iranian clerics and paid for religious opposition to Mossadegh, framing the secular nationalist as hostile to Islam. The documentary record on this element was developed by historian Mark Gasiorowski.
• Military contacts: CIA officers, working with the Shah's court and with dissident Iranian military officers, built a coalition of military units loyal to the Shah. General Fazlollah Zahedi was the designated leader of the post-coup government.
• The first coup attempt (August 15–16, 1953): an initial attempt to arrest Mossadegh failed when loyal troops defended his house. The Shah fled to Baghdad and then Rome. Roosevelt, against CIA orders to stand down, proceeded with a second attempt.
• The successful coup (August 19, 1953): CIA-organised crowds, military units loyal to Zahedi, and pro-Shah elements took control of key communications points and the military headquarters. Mossadegh surrendered and was arrested. Zahedi became Prime Minister. The Shah returned.

The CIA's Own Admission

The 2013 declassified CIA history — formally titled Clandestine Service History: Overthrow of Premier Mossadegh of Iran, November 1952 – August 1953, authored by CIA officer Donald Wilber — is the most direct official admission. The key passage, as reported by the National Security Archive and the New York Times when the document was obtained:

"The military coup that overthrew Mossadegh and his National Front cabinet was carried out under CIA direction as an act of US foreign policy, conceived and approved at the highest levels of government."

This admission was significant not only for its directness but because it came from the CIA's own internal records. Earlier partial admissions had come from the Church Committee (1975), from Kermit Roosevelt's 1979 memoir Countercoup, and from Secretary of State Madeleine Albright's 2000 statement acknowledging the US role and calling it a "setback for Iran's political development."

Consequences: SAVAK, the Shah, and 1979

The restoration of the Shah's full power had consequences that unfolded over twenty-six years:

• SAVAK: the Shah's secret police, established in 1957 with CIA and Israeli Mossad assistance, became notorious for arbitrary arrest, torture, and extra-judicial killing of political opponents. Amnesty International in the 1970s described Iran as having one of the worst human-rights records in the world.
• The 1979 Revolution: accumulated resentment of the Shah's authoritarianism, the role of Western governments in sustaining it, and economic inequality produced the 1979 Islamic Revolution led by Ayatollah Khomeini. The revolution's anti-American character was directly shaped by the Iranian public's awareness of the 1953 coup.
• The hostage crisis: the seizure of the US Embassy and 444-day hostage crisis (1979–1981) was animated in part by the fear — not entirely irrational given the 1953 precedent — that the US was planning a second restoration of the Shah.
• Modern US-Iran relations: the coup is routinely cited by Iranian government figures as the foundational grievance in Iranian-US relations and as justification for distrust of US policy.

What the Confirmed Verdict Covers — and What It Does Not

The confirmed verdict applies to: the CIA planned and executed a covert operation that overthrew Mossadegh, restored the Shah, and constituted, in the CIA's own words, "an act of US foreign policy."

The verdict does not confirm the maximalist version of some retellings:

• The coup was not solely a US production. Iranian internal politics played a significant role. Mossadegh had lost the support of several key constituencies — including the National Front's clerical ally Ayatollah Kashani, who turned against him, and some members of the military establishment — before the coup. The CIA exploited and amplified fractures that already existed.
• The Shah was not purely a passive US puppet. He had his own political ambitions and played an active role in navigating the post-coup consolidation. The CIA often found him indecisive and difficult to direct.
• The framing of "entire blame on the US" understates Iranian agency. Reducing the coup entirely to US manipulation erases the domestic political contest and the agency of Iranian actors on all sides.

Legacy

Mossadegh was convicted of treason by a military court and spent three years in prison, then the remainder of his life (until his death in 1967) under house arrest. He is regarded as a national hero in Iran. His overthrow remains one of the most consequential acts of Cold War-era interventionism and a defining case study in the unintended long-term consequences of covert operations.