Syllabus Edition

First teaching 2024

First exams 2026

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The Berlin Blockade, June 1948 (Edexcel GCSE History)

Revision Note

Zoe Wade

Written by: Zoe Wade

Reviewed by: Bridgette Barrett

The Berlin Blockade, June 1948 - Summary

Economic differences between the Capitalist West and the Communist East prompted the countries of the USA, Britain and France to join their zones together to create Trizonia. Stalin and the Soviet Union saw this as the West’s attempts to weaken the Soviet zone in Germany. This was made worse by the creation of a new currency called the Deutschmark, which all but split Germany in two.

In June 1948, the Soviet Union shut off the land routes in Soviet-controlled Germany, preventing Trizonia from accessing their zone in Berlin. Without supplies from Trizonia, people in West Berlin would run out of food and important resources.

If Trizonia attempted to access West Berlin by land, this would be seen as an act of war by the Soviet Union, which had the Red Army on standby. 

If Trizonia did nothing, West Berlin would be forced to accept help from the Soviet Union, placing them under communist control.

Why Did the Soviet Union Begin the Berlin Blockade?

  • As with Germany, Berlin was split into two parts in March 1948:

    • The USA, Britain and France occupied the western zone

    • The Soviet Union occupied the eastern zone

The development of the division of Germany, 1945-1948

Three maps of post-Second World War Germany: 1945 with four zones by Allies, 1947 with a merged Bizonia, and 1948 with Trizonia. Berlin is highlighted in all maps in the eastern zone of Germany
Maps showing the creation of 'Bizonia' and 'Trizonia'
  • After Trizonia introduced the Deutschmark in June 1948, Stalin wanted to demonstrate that Germany should not be divided

Examiner Tips and Tricks

Students get confused between Bizonia and Trizonia. Bizonia combined Britain's and the USA’s territory in Germany. Trizonia is when France combined their territory with Bizonia in 1948

Causes of the Berlin Blockade

A flowchart depicting key events in Germany post-Second World War, starting with Bizonia in January 1947 and ending with the Berlin Blockade in June 1948.
A timeline showing the events that led up to the Berlin Blockade
  • The Soviet Union decided that preventing Western access to Berlin would be the most effective way of gaining control of Germany

Why did the Soviet Union choose to blockade Berlin?

Flowchart explaining factors leading to the Berlin Blockade: reliance on food, transport access, and Soviet Red Army presence, culminating in the blockade decision.
A diagram showing the reasons why blockading Berlin was the most effective way that Stalin could gain control of Berlin

How did the Soviet Union Blockade Berlin?

  • Berlin was deep inside the Soviet-occupied zone

  • Members of Trizonia had to use the two agreed land routes and two air routes to access their western zone in Berlin

  • In June 1948, the Soviet Union closed road, rail and canal links across Soviet-controlled Germany 

  • Without access to West Berlin, the USA, Britain and France would not be able to send supplies:

    • West Berlin only had enough food for 36 days

    • West Berlin lacked important resources like fuel and medicine

  • Stalin hoped that the Western powers would give up their control of West Berlin, which would allow the Soviet Union to control the whole capital

    • It would also allow him to spread propaganda about the triumph of communism over capitalism

How did the West React to the Blockade?

  • The USA, Britain and France were in a very difficult position after the announcement of the blockade in June 1948

  • Control of West Berlin was important, but they had to balance the risk of going to war

How could the West respond to the Berlin Blockade?

Three options for the West surrounding Berlin: withdraw, supply by land, supply by air, with positive and negative outcomes for each. Green: positive outcomes, red: negative outcomes.
An illustration showing the options that the West could take to resolve the Berlin Blockade
  • Truman was not prepared to abandon the policy of Containment, especially so soon after his announcement of the Truman Doctrine

  • It was decided that supplies flown into West Berlin would be the most effective way to prevent West Berlin from falling into the hands of the Soviet Union and ensure that war between the two 'Superpowers' was prevented

  • What followed was the Berlin Airlift

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Zoe Wade

Author: Zoe Wade

Expertise: History

Zoe has worked in education for 10 years as a teaching assistant and a teacher. This has given her an in-depth perspective on how to support all learners to achieve to the best of their ability. She has been the Lead of Key Stage 4 History, showing her expertise in the Edexcel GCSE syllabus and how best to revise. Ever since she was a child, Zoe has been passionate about history. She believes now, more than ever, the study of history is vital to explaining the ever-changing world around us. Zoe’s focus is to create accessible content that breaks down key historical concepts and themes to achieve GCSE success.

Bridgette Barrett

Author: Bridgette Barrett

Expertise: Geography Lead

After graduating with a degree in Geography, Bridgette completed a PGCE over 25 years ago. She later gained an MA Learning, Technology and Education from the University of Nottingham focussing on online learning. At a time when the study of geography has never been more important, Bridgette is passionate about creating content which supports students in achieving their potential in geography and builds their confidence.