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History

The 1953 Iran Coup

How the CIA and MI6 Overthrew Mohammad Mossadegh

Your teacher assigned the 1953 Iran coup and you have a week. Or you're staring at a unit on Cold War covert operations and the textbook chapter is three dense pages that raise more questions than they answer. Either way, you need the real story — fast.

This TLDR guide covers everything that matters about Operation Ajax: the Anglo-Iranian Oil Company's grip on Iranian oil revenues, Mohammad Mossadegh's rise and his landmark 1951 nationalization law, and the Cold War logic that convinced the Eisenhower administration to green-light a joint CIA-MI6 plot. You'll get a day-by-day reconstruction of the four days in August 1953 when the plan nearly collapsed — and then succeeded — and a clear-eyed account of what came after: the Shah's authoritarian rule, the feared SAVAK secret police, the 1979 Islamic Revolution, and the hostage crisis that still echoes in US-Iran relations today.

Written for high school and early college students, this primer is deliberately short. No padding, no academic jargon. Every key term is defined the first time it appears, and the narrative moves in chronological order so you always know where you are in the story. If you've ever wondered why US-Iran relations history remains so fraught, this is the 90-minute read that explains it.

Grab it, read it before class, and walk in knowing more than you think you do.

What you'll learn
  • Explain the oil dispute between Iran and Britain that triggered the crisis
  • Identify Mohammad Mossadegh and his political program of nationalization and democratic reform
  • Describe the roles of the CIA, MI6, Kermit Roosevelt, and the Shah in Operation Ajax
  • Reconstruct the events of August 15-19, 1953 in Tehran
  • Evaluate the long-term consequences of the coup for Iran, the Cold War, and the 1979 Revolution
What's inside
  1. 1. Iran Before the Coup: Oil, Empire, and a Weak Throne
    Sets the stage by explaining Iran's geopolitical position, the Anglo-Iranian Oil Company, and the political system under the young Shah after World War II.
  2. 2. Mohammad Mossadegh and the Nationalization of Iranian Oil
    Introduces Mossadegh, the National Front, and the 1951 law nationalizing the AIOC, along with the British response of boycott and embargo.
  3. 3. Why Washington Said Yes: The Cold War Frame
    Explains how the Truman administration's caution gave way to Eisenhower-era willingness to act, driven by fears of Tudeh communist influence and Soviet expansion.
  4. 4. Operation Ajax: Planning the Coup
    Details the joint CIA-MI6 plan, the role of Kermit Roosevelt Jr., the recruitment of Iranian agents, and the use of propaganda and bribery.
  5. 5. Four Days in August: The Coup Unfolds
    Day-by-day reconstruction of August 15-19, 1953, from the failed first attempt and the Shah's flight to Rome through the staged demonstrations that brought Zahedi to power.
  6. 6. Aftermath and Legacy: From SAVAK to 1979 and Beyond
    Traces what came next: the Shah's increasingly autocratic rule, the founding of SAVAK, the 1979 Islamic Revolution, the hostage crisis, and the CIA's 2013 acknowledgment of its role.
Published by Solid State Press · June 2026
The 1953 Iran Coup cover
TLDR STUDY GUIDES

The 1953 Iran Coup

How the CIA and MI6 Overthrew Mohammad Mossadegh
Solid State Press

The 1953 Iran Coup

How the CIA and MI6 Overthrew Mohammad Mossadegh

Copyright © 2026 Solid State Press.

Published by Solid State Press.

All rights reserved. No part of this book may be reproduced or transmitted in any form without prior written permission, except for brief quotations in critical reviews and educational use.

Part of the TLDR Study Guides series.

Contents

  1. 1 Iran Before the Coup: Oil, Empire, and a Weak Throne
  2. 2 Mohammad Mossadegh and the Nationalization of Iranian Oil
  3. 3 Why Washington Said Yes: The Cold War Frame
  4. 4 Operation Ajax: Planning the Coup
  5. 5 Four Days in August: The Coup Unfolds
  6. 6 Aftermath and Legacy: From SAVAK to 1979 and Beyond
Chapter 1

Iran Before the Coup: Oil, Empire, and a Weak Throne

Long before American intelligence officers arrived in Tehran with suitcases of cash, Iran was already a country shaped by outside hands. To understand why the 1953 coup was possible — and why so many Iranians experienced it as a wound rather than a rescue — you need to understand three interlocking realities: Iran's geography, its oil, and the fragile political arrangement that held the country together in name but not always in fact.

Geopolitics: The Unlucky Neighborhood

Iran sits at one of the world's most strategically inconvenient addresses. To the north lies Russia — for two centuries an empire hungry for warm-water ports and southward expansion. To the west lie Iraq and Turkey, both with their own great-power patrons. To the east, British India (and later Pakistan and Afghanistan) formed the eastern pillar of the British Empire. Iran was, in the blunt language of nineteenth-century diplomacy, a buffer state: useful precisely because it stood between two rival empires and could be pressured by both.

That pressure was formalized in 1907, when Britain and Russia signed the Anglo-Russian Convention, quietly dividing Iran into spheres of influence without asking anyone in Tehran. Britain controlled the south; Russia the north; a nominally independent strip ran through the middle. Iran was not a party to this agreement. This pattern — outside powers making binding decisions about Iranian territory and resources, treating the country's sovereignty as a polite fiction — is the essential background for everything that follows.

The D'Arcy Concession and the Birth of the AIOC

In 1901, an Englishman named William Knox D'Arcy paid the Iranian government £20,000 in cash and some stock certificates in exchange for the exclusive right to explore for and extract oil across most of the country for sixty years. This agreement is called the D'Arcy Concession, and it is the founding document of modern Iran's oil industry — and of its grievances.

Commercial oil was struck in 1908 in Khuzestan province in southwestern Iran. Within two years, the Anglo-Persian Oil Company (APOC) was formed to develop and sell it — later renamed the Anglo-Iranian Oil Company (AIOC) in 1935. The British government purchased a majority stake in 1914, just before World War I, giving London direct financial interest in Iranian petroleum. By the late 1940s, the AIOC was extracting tens of millions of tons of oil per year from Iranian soil, refining much of it at the massive facility at Abadan — then the largest oil refinery in the world — and selling it at profit margins that made the British Treasury very comfortable.

About This Book

If you are taking AP World History, AP Government, or a college survey course on Cold War Middle East history, this book was written for you. It also works for anyone who keeps hearing about US-Iran relations history and wants the actual backstory — not a Wikipedia rabbit hole.

This is an Operation Ajax CIA Iran history primer that covers everything students get tested on: the Anglo-Iranian oil crisis, Mossadegh's oil nationalization explained simply and in full context, how British and American intelligence recruited the networks that brought down an elected government, and what the aftermath produced. Think of it as a focused 1953 Iran coup study guide for students — roughly fifteen pages, zero filler.

Read straight through once to get the chronology, then go back and review the bolded terms. If your course includes document analysis or essay questions on CIA covert operations history for students, the final section on legacy will give you the analytical framework you need.

Keep reading

You've read the first half of Chapter 1. The complete book covers 6 chapters in roughly fifteen pages — readable in one sitting.

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