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NotesHistory (2028+) HLTopic 13.9
Unit 13 · Paper 3 · History of Europe (HL) · Topic 13.9

IB History (2028+) HL — Europe and the Second World War (1918–1949)

Topic 13.9 of IB History (first exams 2028) covers Europe and the Second World War (1918–1949), which is part of Unit 13: Paper 3 · History of Europe (HL). Students explore key concepts including Europe and WWII — the League and the road to war, Europe and WWII — Allied victory and its impact, Europe and WWII — the Holocaust and responses. A strong understanding of europe and the second world war (1918–1949) is essential for IB History (2028+) HL exams and builds the foundation for connected topics across the syllabus.

Higher Level students should use this topic hub as a map: start with the shared sub-topics, then follow the HL-only extensions and exam-skill links where this topic asks for deeper analysis.

Exam technique guidePractice questions

Key concepts in Europe and the Second World War (1918–1949)

Key Idea: This topic covers three connected stories in Europe, 1918–1949. First, why the peace built after WWI collapsed — the League of Nations failed to stop Italian and German aggression, appeasement bought time but emboldened Hitler, and the Nazi-Soviet Pact opened the door to war in September 1939. Second, why the Allies won that war by 1945 — a mix of economic muscle, wartime alliance-building, and key strategic turning points — and how victory transformed Britain at home. Third, the Holocaust — how Nazi ideology, war, and mass collaboration combined to murder around six million Jews, and how people resisted, rescued, stayed silent, or were finally put on trial.

How this topic is tested (Paper 3)

Paper 3 gives you a choice of essay questions on this region and asks you to write two full essays in 2.5 hours. Nearly every question is phrased as 'To what extent do you agree...' or asks you to evaluate a claim. The top mark band (13–15) needs a clear, sustained argument that reaches a substantiated judgement — not a narrative retelling of events, and you do NOT need to name historians or 'schools of thought' to hit top marks, though showing you know there are debates (like intentionalist vs functionalist views of the Holocaust) helps.

A strong essay always does three things: states a clear thesis in the introduction, weighs evidence FOR and AGAINST the claim using precise facts (dates, names, numbers), and ends with a direct answer to 'to what extent' — never just a summary of both sides.


Must-know facts from every sub-topic

Sub-topicMust-know content
13.9.1 — The League and the road to warLeague founded 1920 (no USA, no army, unanimous voting needed). Worked for small states (Åland, 1921) but failed against great powers (Corfu, 1923; fatally, Abyssinia, 1935 — weak sanctions + secret Hoare-Laval Pact). Hitler's aims: overturn Versailles, Anschluss, Lebensraum. Key dates: Rhineland remilitarised (1936), Rome-Berlin Axis (1936), Anschluss (March 1938), Munich Agreement (Sept 1938, Chamberlain's appeasement), Czechoslovakia seized (March 1939), Nazi-Soviet Pact (23 Aug 1939), invasion of Poland (1 Sept 1939), Britain/France declare war (3 Sept 1939).
13.9.2 — Why the Allies won + impact on BritainGrand Alliance (UK, USA, USSR) held together via Lend-Lease (1941), Tehran (1943, second front agreed), Yalta (Feb 1945). Allied industrial output ~3x the Axis by 1943–44 ('Arsenal of Democracy'); Soviet factories moved east of the Urals. Turning points: Barbarossa (June 1941, two-front war), Stalingrad (1942–43, ~300,000 Axis troops lost), strategic bombing of German oil/rail, D-Day (June 1944). Impact on Britain: Blitz + rationing (to 1954), Beveridge Report (1942) and NHS (1948), Labour's 1945 election landslide over Churchill, women's wartime work (~90% of single women) but limited postwar change, continuing discrimination against 'enemy aliens', Jewish refugees, and Commonwealth servicepeople.
13.9.3 — The HolocaustLong-term Nazi antisemitic ideology (Nuremberg Laws 1935, Kristallnacht 1938) met wartime opportunity: invasion of Poland (1939, 2 million Jews under Nazi rule) and invasion of the USSR (June 1941) triggered mass shootings by the Einsatzgruppen (Babyn Yar, Sept 1941; 1.5 million+ killed). Wannsee Conference (20 Jan 1942, led by Heydrich) systematised deportation to death camps (Auschwitz-Birkenau, Treblinka, and others). Key perpetrators: Hitler, Himmler (SS/camps), Heydrich (Wannsee), Eichmann (deportation logistics). Collaboration: Vichy France, local police and militias (e.g. Jedwabne, 1941). Resistance/rescue: Warsaw Ghetto Uprising (April–May 1943), Schindler, Danish rescue (1943). Allied response was slow (Bermuda Conference, 1943, achieved little). Nuremberg Trials (1945–46) created 'crimes against humanity' as a legal category.

Worked exam question 1 — the League and the causes of war

IB-style questionEvaluate[15 marks]

"The failure of the League of Nations was the main reason for the outbreak of the Second World War in Europe." To what extent do you agree with this statement?

🔒 Model answer plan

See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.

Unlock free for 7 days →

Worked exam question 2 — the Holocaust

IB-style questionTo what extent do you agree[15 marks]

To what extent do you agree that the Wannsee Conference (1942) was the decisive turning point in the Nazi persecution and mass murder of marginalised groups?

🔒 Model answer plan

See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.

Unlock free for 7 days →

Important: Do not write a pure narrative — a list of 'and then this happened, and then this happened' earns very few marks. Paper 3 rewards essays that argue a position and constantly compare causes against each other ('X mattered more than Y because...'). Every paragraph should tie back to your thesis.

Why did the League fail over Abyssinia specifically? Britain and France feared pushing Mussolini toward Hitler and prioritised their own diplomacy over collective security, so sanctions excluded oil, coal and steel, and the secret Hoare-Laval Pact tried to give Mussolini most of Abyssinia anyway.

What convinced Stalin to sign the Nazi-Soviet Pact? The USSR had pushed for collective security against Hitler through the 1930s but was excluded from the Munich Agreement (1938), convincing Stalin the West wasn't a serious partner — so he made his own deal with Hitler in August 1939.

Give one economic reason the Allies won. By 1943–44 combined Allied industrial output was roughly three times the Axis total — the USA's 'Arsenal of Democracy' alone out-produced the whole Axis in aircraft, while Germany suffered chronic fuel shortages after losing Romanian oil fields.

How did WWII change British politics? Despite winning the war, Churchill's Conservatives lost the July 1945 election in a landslide to Attlee's Labour Party, which nationalised industries and founded the NHS (1948), building on the wartime Beveridge Report (1942).

What triggered the mass shootings that began the Holocaust? The invasion of the USSR in June 1941 (Operation Barbarossa) was framed by Hitler as a war of racial annihilation — Einsatzgruppen mobile killing squads followed the army and shot over 1.5 million people, including 33,000+ at Babyn Yar in two days.

Name one act of Jewish resistance and one rescue effort. The Warsaw Ghetto Uprising (April–May 1943) saw poorly-armed fighters hold off German troops for nearly a month; separately, Denmark rescued most of its Jewish population by smuggling them to Sweden in 1943, and Oskar Schindler saved workers in his factories.

Always use precise dates and names, not vague phrases like 'the Nazis did bad things'. When a question says 'to what extent', give a direct answer ('largely, but not solely...') in your final sentence. And remember: for the Holocaust essay, show you know there's a debate about origins (ideology vs. wartime opportunity) even without naming historians by name.

What you'll learn in Topic 13.9

  • 13.9.1 Europe and WWII — the League and the road to war
  • 13.9.2 Europe and WWII — Allied victory and its impact
  • 13.9.3 Europe and WWII — the Holocaust and responses
Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 13.9 Europe and the Second World War (1918–1949)

13.9.1

Europe and WWII — the League and the road to war

Notes
13.9.2

Europe and WWII — Allied victory and its impact

Notes
13.9.3

Europe and WWII — the Holocaust and responses

Notes

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Topic 13.9 Europe and the Second World War (1918–1949) forms a core part of Unit 13: Paper 3 · History of Europe (HL) in IB History (2028+) HL. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

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