3.5.1
The Guarantee for Poland and the War
The Guarantee for Poland and the Declaration of War
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
- 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
- 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
- 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
- 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
- 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.
1Was the Treaty of Versailles Fair?
1.1What were the Motives and Aims at Versailles?
1.2Did the Victors Get Everything They Wanted?
1.3What was the Impact on Germany up to 1923?
1.4Could the Treaty be Justified at the Time?
2Was the League of Nations a Success?
2.1How did Weaknesses in the League Lead to Failure?
2.2The League’s Success in Peacekeeping
2.3How Important was the League's Humanitarian Work?
2.4How did the Depression Impact the League?
3How did Hitler's Foreign Policy Impact the War?
3.1What were the Long-Term Consequences of Versailles
3.2What were the Consequences of the League's Failure
3.3Was the Policy of Appeasement Justified?
3.4How Important was the Nazi-Soviet Pact?
3.5Why did Britain & France Declare War on Germany?
3.5.1The Guarantee for Poland and the War
3.5.2Hitler’s Foreign Policy & Rearmament
3.5.3Hitler's Plan
3.5.4The Saar
3.5.5Remilitarisation of the Rhineland
3.5.6The Rome-Berlin Axis
3.5.7Germany & Italy in the Spanish War
3.5.8The Anti-Comintern Pact
3.5.9Anschluss with Austria
3.5.10The Munich Agreement
3.5.11The Crisis over Czechoslovakia
4Who was to Blame for the Cold War?
4.1Why did the US-Soviet Alliance Break Down?
4.2How did the USSR Gain Control of Easter Europe?
4.3How did the US React to Soviet Expansionism?
4.4What were the Consequences of the Berlin Blockade?
4.5Who was More to Blame for Starting the Cold War?
5Did the US Contain the Spread of Communism?
5.1The US and Korea, 1950-53
5.2The US and Cuba, 1959-62
5.3The US and Vietnam, 1955-75
5.3.1French Rule in Vietnam
5.3.2President Eisenhower
5.3.3President Kennedy
5.3.4The Gulf of Tonkin Incident, 1964
5.3.5US Tactics
5.3.6Vietcong Tactics
5.3.7The Vietcong
5.3.8The My Lai Massacre, 1968
5.3.9Vietnamisation
5.3.10The Tet Offensive, 1968
5.3.11Attacks on Cambodia & Laos
5.3.12The Bombing of North Vietnam
5.3.13The Failure of Vietnamisation
5.3.14The Growth of Opposition
5.3.15The Draft System
5.3.16The Kent State University Shootings, 1970
5.3.17Political Opposition
5.3.18Reasons for Support 1
5.3.19Reasons for Support 2
5.3.20Political Support
5.3.21Peace Negotiations
5.3.22The Paris Peace Accords, 1973
5.3.23Economic & Human Costs 1
5.3.24Economic & Human Costs 2
5.3.25The Strengths of North Vietnam 1
5.3.26The Strengths of North Vietnam 2
5.3.27The Weaknesses of the US 1
5.3.28The Weaknesses of the US 2
5.3.29Opposition in the US
5.3.30Reasons Why USA Lost
6How was USSR's Control Over Eastern Europe?
6.1Opposition to Control in Hungary & Czechoslovakia
6.2Similarities Between Hungary & Czechoslovakia
6.3Why was the Berlin Wall Built?
6.4Solidarity in Poland & Soviet Influence
Jump to other topics
1Was the Treaty of Versailles Fair?
1.1What were the Motives and Aims at Versailles?
1.2Did the Victors Get Everything They Wanted?
1.3What was the Impact on Germany up to 1923?
1.4Could the Treaty be Justified at the Time?
2Was the League of Nations a Success?
2.1How did Weaknesses in the League Lead to Failure?
2.2The League’s Success in Peacekeeping
2.3How Important was the League's Humanitarian Work?
2.4How did the Depression Impact the League?
3How did Hitler's Foreign Policy Impact the War?
3.1What were the Long-Term Consequences of Versailles
3.2What were the Consequences of the League's Failure
3.3Was the Policy of Appeasement Justified?
3.4How Important was the Nazi-Soviet Pact?
3.5Why did Britain & France Declare War on Germany?
3.5.1The Guarantee for Poland and the War
3.5.2Hitler’s Foreign Policy & Rearmament
3.5.3Hitler's Plan
3.5.4The Saar
3.5.5Remilitarisation of the Rhineland
3.5.6The Rome-Berlin Axis
3.5.7Germany & Italy in the Spanish War
3.5.8The Anti-Comintern Pact
3.5.9Anschluss with Austria
3.5.10The Munich Agreement
3.5.11The Crisis over Czechoslovakia
4Who was to Blame for the Cold War?
4.1Why did the US-Soviet Alliance Break Down?
4.2How did the USSR Gain Control of Easter Europe?
4.3How did the US React to Soviet Expansionism?
4.4What were the Consequences of the Berlin Blockade?
4.5Who was More to Blame for Starting the Cold War?
5Did the US Contain the Spread of Communism?
5.1The US and Korea, 1950-53
5.2The US and Cuba, 1959-62
5.3The US and Vietnam, 1955-75
5.3.1French Rule in Vietnam
5.3.2President Eisenhower
5.3.3President Kennedy
5.3.4The Gulf of Tonkin Incident, 1964
5.3.5US Tactics
5.3.6Vietcong Tactics
5.3.7The Vietcong
5.3.8The My Lai Massacre, 1968
5.3.9Vietnamisation
5.3.10The Tet Offensive, 1968
5.3.11Attacks on Cambodia & Laos
5.3.12The Bombing of North Vietnam
5.3.13The Failure of Vietnamisation
5.3.14The Growth of Opposition
5.3.15The Draft System
5.3.16The Kent State University Shootings, 1970
5.3.17Political Opposition
5.3.18Reasons for Support 1
5.3.19Reasons for Support 2
5.3.20Political Support
5.3.21Peace Negotiations
5.3.22The Paris Peace Accords, 1973
5.3.23Economic & Human Costs 1
5.3.24Economic & Human Costs 2
5.3.25The Strengths of North Vietnam 1
5.3.26The Strengths of North Vietnam 2
5.3.27The Weaknesses of the US 1
5.3.28The Weaknesses of the US 2
5.3.29Opposition in the US
5.3.30Reasons Why USA Lost
6How was USSR's Control Over Eastern Europe?
6.1Opposition to Control in Hungary & Czechoslovakia
6.2Similarities Between Hungary & Czechoslovakia
6.3Why was the Berlin Wall Built?
6.4Solidarity in Poland & Soviet Influence
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