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Updated Apr 4, 2026

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2 pages

Soviet Expansion in Eastern Europe: What Happened in 1945-49 and How It Affected the Cold War

Imy

@studywithimy

Soviet expansion in Eastern Europeled to significant geopolitical changes... Show more

# Impact of Soviet Expansionism

Atomic bomb:

* 6th August 1945 - USA exploded atom bomb on Hiroshima

* 9th August - 2nd bomb over Nag

Diplomatic Tensions and the Iron Curtain

The period of Soviet expansion in Eastern Europe was marked by significant diplomatic exchanges that shaped the Cold War landscape. Two key communications, The Long Telegram and The Novikov Telegram, revealed the deep-seated mistrust between the USA and the Soviet Union.

The Long Telegram

George Kennan, America's ambassador in Moscow, sent a telegram discussing US-Soviet relations that had a profound impact on American foreign policy.

Quote: Kennan advised the US government to "regard the Soviet Union as a rival."

Key points of The Long Telegram:

It was taken seriously by the American government.
The message worried the USA government.
Kennan reported that Stalin wanted to see the destruction of capitalism.
He conveyed that the Soviets felt the world outside was hostile and looking to destroy communism.

Highlight: The Long Telegram played a crucial role in shaping the USA's containment policy towards the Soviet Union during the Cold War.

The Novikov Telegram

In response to Kennan's telegram, Nikolai Novikov, a Soviet diplomat working in Washington, sent a telegram that mirrored the distrust from the Soviet perspective.

Key aspects of The Novikov Telegram:

It demonstrated that the Soviets thought poorly of the West.
Novikov claimed that the USA wanted to use massive military power to dominate the world.
He suggested that Americans no longer wanted to cooperate and would support their government if it came to war.
The telegram had a major impact in Moscow, emphasizing the need to develop as much protection as possible.

Example: The mutual distrust evident in these telegrams led to increased military spending and the intensification of the arms race between the two superpowers.

The Iron Curtain Speech

In March 1946, former British Prime Minister Winston Churchill delivered a speech that defined US-Soviet relations and highlighted the Soviet threat to freedom and world peace.

Key points of the Iron Curtain speech:

It was provoked by the establishment of new communist governments in Eastern Europe.
Churchill cleared the speech with President Truman, indicating that it reflected American beliefs as well.
The speech increased tension and mistrust between East and West.
In response, the Soviet Union strengthened its forces and stepped up anti-Western propaganda.

Vocabulary: The term "Iron Curtain" became a metaphor for the ideological and physical boundary dividing Europe into two separate areas from the end of World War II until the end of the Cold War.

The Iron Curtain speech marked a turning point in US-Soviet relations, intensifying hostility and solidifying the division of Europe into two opposing blocs. This event, along with the diplomatic exchanges of The Long Telegram and The Novikov Telegram, set the stage for decades of Cold War tensions and the ongoing struggle between capitalist and communist ideologies.

Atomic Bomb and Soviet Expansionism

The use of atomic bombs by the USA in August 1945 marked a pivotal moment in World War II and set the stage for the Cold War. On August 6th, the USA detonated an atomic bomb over Hiroshima, followed by a second bomb over Nagasaki on August 9th. These devastating attacks, equivalent to 12,000 tons of TNT, resulted in an estimated 120,000 Japanese civilian casualties.

Highlight: The atomic bombs not only aimed to defeat Japan without Soviet involvement but also served as a show of force to threaten the Soviet Union.

The USA's possession of atomic weapons placed it in a powerful position, offering protection to Western Europe. However, this development had unintended consequences:

Stalin felt threatened by the USA's power but became more determined to secure the Soviet Union through buffer communist countries.
Contrary to American hopes, the bomb did not persuade Stalin to allow more freedom in Eastern Europe. Instead, it intensified Cold War tensions and sparked an arms race.

Soviet Expansion Motivations

The Soviet expansion in Eastern Europe was driven by two primary objectives:

Expanding communism
Ensuring security against potential attacks

Definition: Soviet expansionism refers to the USSR's policy of extending its influence and control over Eastern European countries in the aftermath of World War II.

The Soviets implemented several strategies to achieve their expansionist goals:

Establishing communist governments in liberated countries, creating satellite states
Setting up coalition governments where power was shared
Taking control of civil service and media through communist parties
Arresting or forcing opposition leaders to flee
Conducting fixed elections to ensure communist victories

Vocabulary: Satellite states were countries nominally independent but under heavy political, economic, and military influence or control by the Soviet Union.

The Percentage Deal

Churchill proposed a "percentage deal" to divide control over various countries between the Soviet Union and other powers. For example:

Romania: 90% Soviet Union, 10% others
Greece: 90% Soviet Union, 10% others
Hungary: 50% Soviet Union, 50% others

This deal attempted to formalize spheres of influence in Eastern Europe.

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183

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Updated Apr 4, 2026

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2 pages

Soviet Expansion in Eastern Europe: What Happened in 1945-49 and How It Affected the Cold War

Imy

@studywithimy

Soviet expansion in Eastern Europeled to significant geopolitical changes and heightened Cold War tensions. The USSR's actions, including the establishment of communist governments and the creation of satellite states, were driven by a desire to expand communism and ensure... Show more

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Diplomatic Tensions and the Iron Curtain

The Long Telegram

George Kennan, America's ambassador in Moscow, sent a telegram discussing US-Soviet relations that had a profound impact on American foreign policy.

Quote: Kennan advised the US government to "regard the Soviet Union as a rival."

Key points of The Long Telegram:

It was taken seriously by the American government.
The message worried the USA government.
Kennan reported that Stalin wanted to see the destruction of capitalism.
He conveyed that the Soviets felt the world outside was hostile and looking to destroy communism.

Highlight: The Long Telegram played a crucial role in shaping the USA's containment policy towards the Soviet Union during the Cold War.

The Novikov Telegram

In response to Kennan's telegram, Nikolai Novikov, a Soviet diplomat working in Washington, sent a telegram that mirrored the distrust from the Soviet perspective.

Key aspects of The Novikov Telegram:

It demonstrated that the Soviets thought poorly of the West.
Novikov claimed that the USA wanted to use massive military power to dominate the world.
He suggested that Americans no longer wanted to cooperate and would support their government if it came to war.
The telegram had a major impact in Moscow, emphasizing the need to develop as much protection as possible.

Example: The mutual distrust evident in these telegrams led to increased military spending and the intensification of the arms race between the two superpowers.

The Iron Curtain Speech

In March 1946, former British Prime Minister Winston Churchill delivered a speech that defined US-Soviet relations and highlighted the Soviet threat to freedom and world peace.

Key points of the Iron Curtain speech:

It was provoked by the establishment of new communist governments in Eastern Europe.
Churchill cleared the speech with President Truman, indicating that it reflected American beliefs as well.
The speech increased tension and mistrust between East and West.
In response, the Soviet Union strengthened its forces and stepped up anti-Western propaganda.

Vocabulary: The term "Iron Curtain" became a metaphor for the ideological and physical boundary dividing Europe into two separate areas from the end of World War II until the end of the Cold War.

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

Atomic Bomb and Soviet Expansionism

Highlight: The atomic bombs not only aimed to defeat Japan without Soviet involvement but also served as a show of force to threaten the Soviet Union.

The USA's possession of atomic weapons placed it in a powerful position, offering protection to Western Europe. However, this development had unintended consequences:

Stalin felt threatened by the USA's power but became more determined to secure the Soviet Union through buffer communist countries.
Contrary to American hopes, the bomb did not persuade Stalin to allow more freedom in Eastern Europe. Instead, it intensified Cold War tensions and sparked an arms race.

Soviet Expansion Motivations

The Soviet expansion in Eastern Europe was driven by two primary objectives:

Expanding communism
Ensuring security against potential attacks

Definition: Soviet expansionism refers to the USSR's policy of extending its influence and control over Eastern European countries in the aftermath of World War II.

The Soviets implemented several strategies to achieve their expansionist goals:

Establishing communist governments in liberated countries, creating satellite states
Setting up coalition governments where power was shared
Taking control of civil service and media through communist parties
Arresting or forcing opposition leaders to flee
Conducting fixed elections to ensure communist victories

Vocabulary: Satellite states were countries nominally independent but under heavy political, economic, and military influence or control by the Soviet Union.

The Percentage Deal

Churchill proposed a "percentage deal" to divide control over various countries between the Soviet Union and other powers. For example:

Romania: 90% Soviet Union, 10% others
Greece: 90% Soviet Union, 10% others
Hungary: 50% Soviet Union, 50% others

This deal attempted to formalize spheres of influence in Eastern Europe.