AQA GCSE History: Conflict and Tension 1918-1939 Revision Guide

Conflict and Tension: The Inter-War Years 1918-1939 is one of the most popular options for the AQA GCSE History Wider World Depth Study. It covers a dramatic twenty-year period in which the world tried -- and ultimately failed -- to build a lasting peace after the First World War. The topic asks you to grapple with questions historians still argue about: Was the Treaty of Versailles too harsh? Could the League of Nations ever have worked? Was appeasement a reasonable policy or a catastrophic mistake?

This guide covers the full specification content, the key individuals you need to know, and practical exam technique advice. If you want to practise under exam conditions, try our Conflict and Tension 1918-1939 course.

The Exam: What You Need to Know

This topic appears on Paper 1: Understanding the Modern World, Section B (Wider World Depth Study). The whole paper lasts 1 hour 45 minutes for 84 marks total. You should spend roughly 50-55 minutes on the depth study section.

The question types you will face are:

• Source utility question (8 marks) -- "How useful is Source B for an enquiry into...?" You evaluate both the content and provenance of the source.
• "Write an account" question (8 marks) -- an analytical narrative explaining how events connected and led to consequences.
• Essay question (16 marks + 4 SPaG) -- "Which of the following was the more important reason for...?" or "How far do you agree that...?" A sustained argument considering multiple factors and reaching a clear judgement.

Understanding these question types is just as important as knowing the content. You can find a full breakdown in our exam technique guide.

Part 1: Peacemaking 1918-1919

The Aims of the Big Three

The Treaty of Versailles, signed in June 1919, was negotiated at the Paris Peace Conference by the victorious nations. Germany had no say in its terms -- a fact that generated enormous resentment from the outset. Three leaders dominated the negotiations, each with different priorities.

Woodrow Wilson (USA) wanted a fair and lasting peace based on his Fourteen Points -- self-determination, disarmament, free trade, and a League of Nations. He believed punishing Germany too harshly would create bitterness and lead to another war.

Georges Clemenceau (France) wanted to punish Germany and protect France. With over 1.3 million soldiers killed and northern France devastated, he demanded heavy reparations, a reduced German military, and the return of Alsace-Lorraine. The French public expected vengeance.

David Lloyd George (Britain) occupied a middle position. He had won the 1918 election partly on promises to "make Germany pay," but he recognised that destroying Germany economically would damage British trade. He wanted Germany weakened -- losing colonies and naval power -- but not so crushed that it would cause long-term instability.

The Terms of the Treaty

Territorial losses: Germany lost 13% of its land and 10% of its population. Alsace-Lorraine returned to France. The Saar coalfields were placed under League control for 15 years. West Prussia and Posen went to Poland, creating the "Polish Corridor" that split East Prussia from the rest of Germany. All overseas colonies became League of Nations mandates.

Military restrictions: The army was limited to 100,000 men with no conscription. The navy was restricted to six battleships and no submarines. No air force was permitted. The Rhineland was demilitarised.

War guilt and reparations: Article 231 -- the War Guilt Clause -- forced Germany to accept full responsibility for the war. Reparations were set at 6.6 billion pounds in 1921.

The League of Nations: The treaty created the League to maintain peace, but Germany was initially excluded from membership.

Criticisms of the Treaty

Germans called it a "diktat" -- a dictated peace. They considered the war guilt clause unjust, the reparations crippling, and the territorial losses humiliating. Resentment towards Versailles became central to German politics throughout the 1920s and 1930s.

Others felt the treaty was not harsh enough. Clemenceau was criticised at home for not securing more for France. Crucially, the US Senate refused to ratify the treaty, meaning America never joined the League of Nations -- a devastating blow to the organisation Wilson himself had championed.

Part 2: The League of Nations

Structure and Weaknesses

The League was established in 1920 in Geneva. Its main bodies were the Assembly (all members, met annually, required unanimous decisions), the Council (met more frequently, with permanent members Britain, France, Italy, and Japan), the Secretariat (administration), and various commissions dealing with health, refugees, and labour.

The League had critical weaknesses from the start. The USA never joined. The Soviet Union was excluded until 1934. Germany was not admitted until 1926. The League had no army and relied on member nations to enforce decisions -- which they were often reluctant to do.

Successes in the 1920s

Examiners reward students who acknowledge these rather than dismissing the League as a total failure.

Aaland Islands (1921): Both Sweden and Finland claimed these islands. The League awarded them to Finland with protections for the Swedish-speaking population. Both nations accepted.

Upper Silesia (1921): Claimed by Germany and Poland, the League divided the region after a plebiscite, with safeguards for minorities. Both nations accepted.

The League also resolved a dispute between Greece and Bulgaria (1925) and did important humanitarian work on health, slavery, and refugee resettlement.

Failures in the 1930s

Manchuria (1931-1933): Japan invaded Manchuria, staging the Mukden Incident as a pretext. The League sent the Lytton Commission, which took over a year to report. It concluded Japan was the aggressor, but Japan ignored the ruling and left the League. No sanctions or military action followed. This showed the League could not control a major power willing to defy it.

Abyssinia (1935-1936): Mussolini invaded Abyssinia to build an Italian empire. The League imposed limited sanctions but excluded oil, coal, and steel -- the resources Italy actually needed. Britain and France were reluctant to antagonise Mussolini because they wanted him as an ally against Hitler. The leaked Hoare-Laval Pact -- a secret plan to give most of Abyssinia to Italy -- caused a scandal and revealed where British and French priorities lay. Italy completed its conquest by May 1936, effectively destroying the League's credibility.

Part 3: The Collapse of International Peace

Hitler's Foreign Policy

Hitler became Chancellor in January 1933 with clear aims rooted in Mein Kampf: overturn the Treaty of Versailles, unite all German-speaking people (including Austria and the Sudetenland), and expand eastwards for Lebensraum ("living space").

The Steps to War

Rearmament (1933-1935): Hitler openly reintroduced conscription and announced the Luftwaffe, violating the treaty. Britain responded with the Anglo-German Naval Agreement (1935), allowing Germany a navy 35% the size of Britain's -- effectively legitimising rearmament without consulting France.

Remilitarisation of the Rhineland (March 1936): Hitler sent troops into the demilitarised Rhineland. The German army was still weak, and Hitler later admitted he would have withdrawn if France had resisted. France did not act without British support, and Britain argued Germany was simply "walking into its own back yard." The lack of response emboldened Hitler.

Anschluss with Austria (March 1938): Hitler pressured Austria into union with Germany. When Austrian Chancellor Schuschnigg tried to hold a referendum on independence, Hitler demanded his resignation and sent in troops. The Anschluss was forbidden by the Treaty of Versailles, but Britain and France took no action.

The Sudetenland and Munich Agreement (September 1938): Hitler demanded Czechoslovakia hand over the Sudetenland, home to three million ethnic Germans. Chamberlain flew to Germany three times to negotiate. At the Munich Conference, Britain, France, Germany, and Italy agreed to the transfer. Czechoslovakia was not invited. Chamberlain returned claiming "peace for our time."

The destruction of Czechoslovakia (March 1939): Hitler occupied the rest of Czechoslovakia, breaking the Munich Agreement. This could not be justified by self-determination. Britain and France recognised appeasement had failed and guaranteed Poland's independence.

The Nazi-Soviet Pact (August 1939): Germany and the Soviet Union agreed not to attack each other and secretly planned to divide Poland. This removed the threat of a two-front war for Hitler.

The invasion of Poland (September 1939): Germany invaded on 1 September. Britain and France declared war on 3 September. The inter-war period was over.

The Appeasement Debate

Appeasement is one of the most debated topics in this unit, and examiners reward balanced analysis.

Arguments in favour: Britain and France were not militarily ready for war in 1938 -- appeasement bought time for rearmament. The British public was overwhelmingly opposed to war after the trauma of 1914-18. Some of Hitler's demands seemed reasonable under the principle of self-determination. The threat of Soviet communism made some leaders reluctant to weaken Germany as a buffer.

Arguments against: Each concession emboldened Hitler and convinced him the West would not fight. It sacrificed smaller nations without their consent. Czechoslovakia had a strong army and defensible borders that were lost after Munich. It gave Hitler time to rearm. It damaged trust with the Soviet Union, which saw Munich as proof that Britain and France were unreliable.

The strongest answers acknowledge both sides and reach a judgement, rather than simply arguing Chamberlain was naive.

Key Individuals

Woodrow Wilson -- US President. Championed the League of Nations and self-determination. His failure to secure Senate ratification undermined his own creation.

Georges Clemenceau -- French PM. Demanded a harsh treaty to punish Germany and protect France, driven by devastating losses and public pressure.

David Lloyd George -- British PM. Balanced public demands for punishment with the pragmatic need for a stable, trading Europe.

Adolf Hitler -- German dictator from 1933. Systematically dismantled the Treaty of Versailles and the post-war order, leading directly to the Second World War.

Benito Mussolini -- Italian dictator. His invasion of Abyssinia destroyed the League's credibility. The Rome-Berlin Axis (1936) strengthened the fascist bloc.

Neville Chamberlain -- British PM 1937-1940. Most closely associated with appeasement. His decision at Munich remains one of the most debated choices in twentieth-century history.

Exam Technique

Source Utility Question (8 marks)

How to answer:

1. Content -- what does the source tell us that is relevant to the enquiry? Use specific details and support with your own knowledge.
2. Provenance -- who produced it, when, and why? This does not mean dismissing it as "biased." A propaganda poster is useful precisely because it shows what a government wanted people to believe.
3. Limitations -- what does the source not cover? What perspective is missing?

"Write an Account" Questions (8 marks)

These ask for an analytical narrative -- not just what happened, but how and why events connected.

• Cover two or three key events in chronological order.
• Link them with analytical connectives: "This led to...", "As a consequence...", "This was significant because..."
• The examiner wants to see you understand connections, not just facts.

Essay Question (16 marks + 4 SPaG)

1. Introduction -- briefly outline your argument.
2. Paragraph 1 -- address the factor in the question with specific evidence.
3. Paragraphs 2-3 -- address alternative factors and weigh them against the factor in the question.
4. Conclusion -- reach a clear judgement explaining how factors link together.

Remember 4 marks are for spelling, punctuation, and grammar. Write in clear, formal English.

For worked examples of every question type, see our AQA GCSE History exam technique guide.

Common Mistakes to Avoid

Confusing Treaty terms. Know the specific numbers (100,000 troops, 6.6 billion pounds, 13% of territory) and which category each term belongs to. Do not mix up territorial, military, and financial terms.

Dismissing the League as a total failure. The League had genuine successes in the 1920s -- Aaland, Upper Silesia, humanitarian work. Only writing about Manchuria and Abyssinia gives a one-sided picture. Explain why the League succeeded in some cases but failed in others.

One-sided views on appeasement. Calling Chamberlain foolish ignores the context -- military unreadiness, public opposition to war, the trauma of 1914-18. But calling appeasement entirely reasonable ignores the real costs to nations like Czechoslovakia. Examiners reward balance.

Narrating without analysing. The most common mistake across all question types. Do not just describe what happened -- explain why it happened, what its consequences were, and how it connects to the question. Every paragraph needs explanation, not just description.

Ignoring provenance on source questions. Discussing only what a source says -- without considering who produced it and why -- caps your mark. Provenance is not about calling a source biased. It is about understanding what the source's origins reveal about its value for the enquiry.

Final Thoughts

Conflict and Tension 1918-1939 rewards students who think critically. The inter-war years are full of genuine dilemmas -- leaders making difficult decisions with imperfect information, idealistic plans colliding with political reality, and the slow realisation that peace was slipping away. Show the examiner you understand these complexities rather than reducing everything to simple narratives, and you will do very well.

Practise exam-style questions regularly, time yourself under exam conditions, and review the mark schemes. To test your knowledge of this topic, try our Conflict and Tension 1918-1939 practice questions.