Source: https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-1-the-guarantee-for-poland-and-the-war

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# The Guarantee for Poland and the War

History: Cambridge International GCSE The Twentieth Century (Option B), topic 3.5.1

## The Guarantee for Poland and the Declaration of War

Britain and France promised to defend Poland in 1939, leading to their declaration of war on Germany after its invasion of Poland. This action marked WWII's start.

### Britain and France agreements

![Britain and France agreements](https://image-v2.cdn.app.senecalearning.com/2022-08/172b1de7-ac8a-48c7-b73c-0e1ba2471926/agreement4.jpg)

- Britain and France signed agreements to protect Poland from German attack.   
 - Britain made its guarantee on 31 March 1939.    
 - France followed with a similar promise on 6 April 1939.   
- These guarantees aimed to deter Germany from invading Poland.

### Reasons for the guarantees

![Reasons for the guarantees](https://image-v2.cdn.app.senecalearning.com/2018-09/e3c8609f-7236-42a4-a382-a937041982bf/stop-sign-.jpg)

- Britain wanted to stop German expansion after Czechoslovakia's fall.   
- France feared losing an ally against Germany.   
- Britain and France hoped the guarantees would keep peace by warning Germany.   
 - Poland relied on these guarantees to resist German threats.

### German invasion of Poland

![German invasion of Poland](https://image-v2.cdn.app.senecalearning.com/2019-04/60b6be9c-9390-441c-888e-bf3db469d1e3/v1-doodlebug-ww2-war-.jpg)

- Germany invaded Poland on 1 September 1939.   
- The invasion used fast-moving tanks and aircraft, called Blitzkrieg.   
- Poland faced attack from the west by Germany and from the east by the Soviet Union.   
 - Poland could not fight both enemies alone.

### Britain and France declare war

![Britain and France declare war](https://image-v2.cdn.app.senecalearning.com/2018-11/7c9cc549-6cd0-4d97-b8e6-1c044091fe3d/ww1.jpg)

- Britain declared war on Germany on 3 September 1939.   
 - France declared war the same day.   
- These declarations followed Germany's refusal to withdraw from Poland.   
- The declarations marked the official start of the Second World War.

### Consequences of the guarantees

![Consequences of the guarantees](https://image-v2.cdn.app.senecalearning.com/2018-07/e3ea7083-ea65-4abb-8521-569b8ce883f8/WW1.Battle.jpg)

- Britain and France's war declaration showed they kept their promises to Poland.   
- The war ended appeasement policies tried earlier.   
- The guarantees pushed Britain and France into full conflict with Germany.  
- Poland suffered invasion but gained international support in war.

## Test yourself on The Guarantee for Poland and the War

- What triggered Britain and France to declare war on Germany?
- Why did Britain issue the guarantee to Poland on 31 March 1939?

[Practise this topic for free](https://app.senecalearning.com/classroom/course/bde822bc-1ee8-46a6-8c98-090be2f1d690/section/56d56a81-5e15-408d-ad80-ce8b10fc6874/session)

- Previous topic: [3.4.2 The Polish Crisis & the Outbreak of War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-4-2-the-polish-crisis-and-the-outbreak-of-war.md)
- Next topic: [3.5.2 Hitler’s Foreign Policy & Rearmament](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-2-hitlers-foreign-policy-and-rearmament.md)

## History: Cambridge International GCSE The Twentieth Century (Option B) contents

### 1 Was the Treaty of Versailles Fair?
- 1.1 What were the Motives and Aims at Versailles?
  - [1.1.1 The Treaty of Versailles](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-1-1-the-treaty-of-versailles.md)
  - [1.1.2 Roles of Wilson, Clemenceau & George](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-1-2-roles-of-wilson-clemenceau-and-george.md)
- 1.2 Did the Victors Get Everything They Wanted?
  - [1.2.1 The Terms: Territory](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-1-the-terms-territory.md)
  - [1.2.2 The Terms: Reparations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-2-the-terms-reparations.md)
  - [1.2.3 The Terms: Armaments](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-3-the-terms-armaments.md)
  - [1.2.4 The Terms: War Guilt](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-4-the-terms-war-guilt.md)
  - [1.2.5 The League of Nations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-5-the-league-of-nations.md)
  - [1.2.6 French Reaction](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-6-french-reaction.md)
  - [1.2.7 American Reaction](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-7-american-reaction.md)
  - [1.2.8 British Reaction](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-8-british-reaction.md)
  - [1.2.9 Countries Left Out of the Treaty of Versailles](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-2-9-countries-left-out-of-the-treaty-of-versailles.md)
- 1.3 What was the Impact on Germany up to 1923?
  - [1.3.1 German Reaction to the Treaty](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-1-german-reaction-to-the-treaty.md)
  - [1.3.2 Germany’s Allies](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-2-germanys-allies.md)
  - [1.3.3 Economic Impacts: Ruhr & Hyperinflation](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-3-economic-impacts-ruhr-and-hyperinflation.md)
  - [1.3.4 Social Impacts of the Treaty in Germany](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-4-social-impacts-of-the-treaty-in-germany.md)
  - [1.3.5 Political Impacts of the Treaty on Germany](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-5-political-impacts-of-the-treaty-on-germany.md)
  - [1.3.6 Reducing Reparation: The Dawes Plan](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-3-6-reducing-reparation-the-dawes-plan.md)
- 1.4 Could the Treaty be Justified at the Time?
  - [1.4.1 Positives & Negatives](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-4-1-positives-and-negatives.md)
  - [1.4.2 Contemporary Opinions About the Treaty](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/1-4-2-contemporary-opinions-about-the-treaty.md)

### 2 Was the League of Nations a Success?
- 2.1 How did Weaknesses in the League Lead to Failure?
  - [2.1.1 The League of Nations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-1-the-league-of-nations.md)
  - [2.1.2 Structure of the League: Assembly & Council](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-2-structure-of-the-league-assembly-and-council.md)
  - [2.1.3 Structure of the League: Special Commissions](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-3-structure-of-the-league-special-commissions.md)
  - [2.1.4 Structure of the League: Permanent Court](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-4-structure-of-the-league-permanent-court.md)
  - [2.1.5 Structure of the League: Secretariat](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-5-structure-of-the-league-secretariat.md)
  - [2.1.6 Financial Crisis in the World](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-1-6-financial-crisis-in-the-world.md)
- 2.2 The League’s Success in Peacekeeping
  - [2.2.1 Successes: International Borders](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-1-successes-international-borders.md)
  - [2.2.2 Successes: International Agreements](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-2-successes-international-agreements.md)
  - [2.2.3 Failures: Vilna (1920)](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-3-failures-vilna-1920.md)
  - [2.2.4 Åland Islands 1920-21](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-4-aland-islands-1920-21.md)
  - [2.2.5 Failures: Corfu 1923](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-5-failures-corfu-1923.md)
  - [2.2.6 Failures: Bulgaria 1925](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-2-6-failures-bulgaria-1925.md)
- 2.3 How Important was the League's Humanitarian Work?
  - [2.3.1 Refugees, Health, Slavery, Working Conditions 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-3-1-refugees-health-slavery-working-conditions-1.md)
  - [2.3.2 Refugees, Health, Slavery, Working Conditions 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-3-2-refugees-health-slavery-working-conditions-2.md)
- 2.4 How did the Depression Impact the League?
  - [2.4.1 The Great Depression, 1929](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-4-1-the-great-depression-1929.md)
  - [2.4.2 The Manchurian Crisis, 1931](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-4-2-the-manchurian-crisis-1931.md)
  - [2.4.3 Invasion of Abyssinia, 1935](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/2-4-3-invasion-of-abyssinia-1935.md)

### 3 How did Hitler's Foreign Policy Impact the War?
- 3.1 What were the Long-Term Consequences of Versailles
  - [3.1.1 Long-Term Consequences of Versailles](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-1-1-long-term-consequences-of-versailles.md)
- 3.2 What were the Consequences of the League's Failure
  - [3.2.1 The Disarmament Conference](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-2-1-the-disarmament-conference.md)
  - [3.2.2 Collapse of the League of Nations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-2-2-collapse-of-the-league-of-nations.md)
  - [3.2.3 Tension in Europe in the 1930s](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-2-3-tension-in-europe-in-the-1930s.md)
  - [3.2.4 WWII & Failure of the League of Nations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-2-4-wwii-and-failure-of-the-league-of-nations.md)
  - [3.2.5 Weak Nations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-2-5-weak-nations.md)
- 3.3 Was the Policy of Appeasement Justified?
  - [3.3.1 The Spanish Civil War, 1936-39](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-1-the-spanish-civil-war-1936-39.md)
  - [3.3.2 The Sudetenland](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-2-the-sudetenland.md)
  - [3.3.3 Arguments for Appeasement](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-3-arguments-for-appeasement.md)
  - [3.3.4 Arguments Against Appeasement](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-4-arguments-against-appeasement.md)
  - [3.3.5 Reasons & Acts of Appeasement](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-5-reasons-and-acts-of-appeasement.md)
  - [3.3.6 Impact of Appeasement](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-3-6-impact-of-appeasement.md)
- 3.4 How Important was the Nazi-Soviet Pact?
  - [3.4.1 The Nazi-Soviet Pact](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-4-1-the-nazi-soviet-pact.md)
  - [3.4.2 The Polish Crisis & the Outbreak of War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-4-2-the-polish-crisis-and-the-outbreak-of-war.md)
- 3.5 Why did Britain & France Declare War on Germany?
  - [3.5.1 The Guarantee for Poland and the War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-1-the-guarantee-for-poland-and-the-war.md)
  - [3.5.2 Hitler’s Foreign Policy & Rearmament](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-2-hitlers-foreign-policy-and-rearmament.md)
  - [3.5.3 Hitler's Plan](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-3-hitlers-plan.md)
  - [3.5.4 The Saar](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-4-the-saar.md)
  - [3.5.5 Remilitarisation of the Rhineland](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-5-remilitarisation-of-the-rhineland.md)
  - [3.5.6 The Rome-Berlin Axis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-6-the-rome-berlin-axis.md)
  - [3.5.7 Germany & Italy in the Spanish War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-7-germany-and-italy-in-the-spanish-war.md)
  - [3.5.8 The Anti-Comintern Pact](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-8-the-anti-comintern-pact.md)
  - [3.5.9 Anschluss with Austria](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-9-anschluss-with-austria.md)
  - [3.5.10 The Munich Agreement](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-10-the-munich-agreement.md)
  - [3.5.11 The Crisis over Czechoslovakia](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/3-5-11-the-crisis-over-czechoslovakia.md)

### 4 Who was to Blame for the Cold War?
- 4.1 Why did the US-Soviet Alliance Break Down?
  - [4.1.1 Cold War - Definition](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-1-cold-war-definition.md)
  - [4.1.2 The Grand Alliance](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-2-the-grand-alliance.md)
  - [4.1.3 The 1945 Summit Conferences](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-3-the-1945-summit-conferences.md)
  - [4.1.4 Early US-Soviet Relations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-4-early-us-soviet-relations.md)
  - [4.1.5 The Breakdown of the US-Soviet Alliance](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-5-the-breakdown-of-the-us-soviet-alliance.md)
  - [4.1.6 Attitudes of Truman & Stalin](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-6-attitudes-of-truman-and-stalin.md)
  - [4.1.7 US & Soviet Attitudes to Peace](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-1-7-us-and-soviet-attitudes-to-peace.md)
- 4.2 How did the USSR Gain Control of Eastern Europe?
  - [4.2.1 The USSR & Eastern Europe](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-2-1-the-ussr-and-eastern-europe.md)
- 4.3 How did the US React to Soviet Expansionism?
  - [4.3.1 The Beginning of the Cold War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-3-1-the-beginning-of-the-cold-war.md)
  - [4.3.2 The Truman Doctrine & Marshall Plan](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-3-2-the-truman-doctrine-and-marshall-plan.md)
  - [4.3.3 East-West Boundaries](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-3-3-east-west-boundaries.md)
  - [4.3.4 Berlin Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-3-4-berlin-crisis.md)
- 4.4 What were the Consequences of the Berlin Blockade?
  - [4.4.1 Germany](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-1-germany.md)
  - [4.4.2 Bizonia](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-2-bizonia.md)
  - [4.4.3 Berlin Blockade](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-3-berlin-blockade.md)
  - [4.4.4 FRG & GDR](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-4-frg-and-gdr.md)
  - [4.4.5 NATO](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-5-nato.md)
  - [4.4.6 Warsaw Pact](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-4-6-warsaw-pact.md)
- 4.5 Who was More to Blame for Starting the Cold War?
  - [4.5.1 The Responsibility for Cold War Tensions](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-5-1-the-responsibility-for-cold-war-tensions.md)
  - [4.5.2 Blame on the USRR](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-5-2-blame-on-the-usrr.md)
  - [4.5.3 Blame on the US](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-5-3-blame-on-the-us.md)
  - [4.5.4 Sharing the Blame](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/4-5-4-sharing-the-blame.md)

### 5 Did the US Contain the Spread of Communism?
- 5.1 The US and Korea, 1950-53
  - [5.1.1 The US and Korea: Background to the Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-1-1-the-us-and-korea-background-to-the-crisis.md)
  - [5.1.2 The Korean War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-1-2-the-korean-war.md)
  - [5.1.3 The Course of the Korean War](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-1-3-the-course-of-the-korean-war.md)
- 5.2 The US and Cuba, 1959-62
  - [5.2.1 Build-Up to the Cuban Missile Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-2-1-build-up-to-the-cuban-missile-crisis.md)
  - [5.2.2 The Cuban Missile Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-2-2-the-cuban-missile-crisis.md)
  - [5.2.3 Consequence of the Cuban Missile Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-2-3-consequence-of-the-cuban-missile-crisis.md)
- 5.3 The US and Vietnam, 1955-75
  - [5.3.1 French Rule in Vietnam](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-1-french-rule-in-vietnam.md)
  - [5.3.2 President Eisenhower](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-2-president-eisenhower.md)
  - [5.3.3 President Kennedy](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-3-president-kennedy.md)
  - [5.3.4 The Gulf of Tonkin Incident, 1964](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-4-the-gulf-of-tonkin-incident-1964.md)
  - [5.3.5 US Tactics](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-5-us-tactics.md)
  - [5.3.6 Vietcong Tactics](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-6-vietcong-tactics.md)
  - [5.3.7 The Vietcong](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-7-the-vietcong.md)
  - [5.3.8 The My Lai Massacre, 1968](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-8-the-my-lai-massacre-1968.md)
  - [5.3.9 Vietnamisation](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-9-vietnamisation.md)
  - [5.3.10 The Tet Offensive, 1968](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-10-the-tet-offensive-1968.md)
  - [5.3.11 Attacks on Cambodia & Laos](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-11-attacks-on-cambodia-and-laos.md)
  - [5.3.12 The Bombing of North Vietnam](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-12-the-bombing-of-north-vietnam.md)
  - [5.3.13 The Failure of Vietnamisation](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-13-the-failure-of-vietnamisation.md)
  - [5.3.14 The Growth of Opposition](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-14-the-growth-of-opposition.md)
  - [5.3.15 The Draft System](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-15-the-draft-system.md)
  - [5.3.16 The Kent State University Shootings, 1970](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-16-the-kent-state-university-shootings-1970.md)
  - [5.3.17 Political Opposition](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-17-political-opposition.md)
  - [5.3.18 Reasons for Support 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-18-reasons-for-support-1.md)
  - [5.3.19 Reasons for Support 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-19-reasons-for-support-2.md)
  - [5.3.20 Political Support](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-20-political-support.md)
  - [5.3.21 Peace Negotiations](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-21-peace-negotiations.md)
  - [5.3.22 The Paris Peace Accords, 1973](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-22-the-paris-peace-accords-1973.md)
  - [5.3.23 Economic & Human Costs 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-23-economic-and-human-costs-1.md)
  - [5.3.24 Economic & Human Costs 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-24-economic-and-human-costs-2.md)
  - [5.3.25 The Strengths of North Vietnam 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-25-the-strengths-of-north-vietnam-1.md)
  - [5.3.26 The Strengths of North Vietnam 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-26-the-strengths-of-north-vietnam-2.md)
  - [5.3.27 The Weaknesses of the US 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-27-the-weaknesses-of-the-us-1.md)
  - [5.3.28 The Weaknesses of the US 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-28-the-weaknesses-of-the-us-2.md)
  - [5.3.29 Opposition in the US](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-29-opposition-in-the-us.md)
  - [5.3.30 Reasons Why USA Lost](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/5-3-30-reasons-why-usa-lost.md)

### 6 How was USSR's Control Over Eastern Europe?
- 6.1 Opposition to Control in Hungary & Czechoslovakia
  - [6.1.1 Causes of Opposition](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-1-1-causes-of-opposition.md)
  - [6.1.2 The Hungarian Uprising](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-1-2-the-hungarian-uprising.md)
  - [6.1.3 Czechoslovakia, 1968](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-1-3-czechoslovakia-1968.md)
  - [6.1.4 Reaction to the Brezhnev Doctrine](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-1-4-reaction-to-the-brezhnev-doctrine.md)
- 6.2 Similarities Between Hungary & Czechoslovakia
  - [6.2.1 Hungary and Czechoslovakia 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-2-1-hungary-and-czechoslovakia-1.md)
  - [6.2.2 Hungary & Czechoslovakia 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-2-2-hungary-and-czechoslovakia-2.md)
- 6.3 Why was the Berlin Wall Built?
  - [6.3.1 The Berlin Wall 1](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-3-1-the-berlin-wall-1.md)
  - [6.3.2 The Berlin Wall 2](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-3-2-the-berlin-wall-2.md)
  - [6.3.3 The U2 Crisis](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-3-3-the-u2-crisis.md)
- 6.4 Solidarity in Poland & Soviet Influence
  - [6.4.1 Solidarity in Poland](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-4-1-solidarity-in-poland.md)
- 6.5 Gorbachev's Responsibility
  - [6.5.1 Reagan & Gorbachev](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-5-1-reagan-and-gorbachev.md)
  - [6.5.2 Reagan and the ‘Second Cold War’](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-5-2-reagan-and-the-second-cold-war.md)
  - [6.5.3 The Collapse of Soviet Control](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-5-3-the-collapse-of-soviet-control.md)
  - [6.5.4 The Collapse of the USSR](https://senecalearning.com/en-gb/revision-notes/igcse/history/cambridge-international/6-5-4-the-collapse-of-the-ussr.md)