At GCSE
At GCSE you explain the MAIN factors (militarism, alliances, imperialism, nationalism) and the assassination of Franz Ferdinand as the trigger. Strong answers reach a judgement about which factor mattered most.
GCSEA-LevelAQAEdexcelOCR
Causes of World War One revision — GCSE & A-Level History
The causes of the First World War are a staple of GCSE and A-Level History. Top-band answers go beyond the MAIN acronym (Militarism, Alliances, Imperialism, Nationalism) to weigh short-term triggers against long-term tensions.
The assassination of Archduke Franz Ferdinand in Sarajevo (28 June 1914) lit the fuse, but Europe had been arming, allying and competing for empire for decades. Strong essays reach a sustained judgement about which factor mattered most — and why.
At A-Level
At A-Level you engage with the historiography — the Fischer thesis on German responsibility, structural vs intentionalist readings, and the role of the July Crisis. Source evaluation (provenance, content, tone, context) is essential for high marks.
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Example flashcards
Q: What does the acronym MAIN stand for in the causes of WW1?
A: Militarism, Alliances, Imperialism, Nationalism.
Q: Who assassinated Archduke Franz Ferdinand, and when?
A: Gavrilo Princip, a Bosnian Serb member of the Black Hand, on 28 June 1914 in Sarajevo.
Q: Which two alliance systems faced each other in 1914?
A: The Triple Entente (Britain, France, Russia) and the Triple Alliance (Germany, Austria-Hungary, Italy).
Q: Why did Britain declare war on Germany on 4 August 1914?
A: Because Germany invaded neutral Belgium, violating the 1839 Treaty of London which guaranteed Belgian neutrality.
Quick summary
Causes of World War One is a high-yield History topic for GCSE and A-Level students (AQA, Edexcel, OCR). At A-Level you engage with the historiography — the Fischer thesis on German responsibility, structural vs intentionalist readings, and the role of the July Crisis. Examiners reward precise definitions and applied explanations — focus on the core ideas and the small set of terms that come up every series.
Key terms
- Militarism
- Alliances
- Imperialism
- Nationalism
- Triple Entente
- Triple Alliance
- Franz Ferdinand
- Schlieffen Plan
- July Crisis
Causes of World War One FAQs
Was the assassination of Franz Ferdinand the main cause of WW1?+
It was the trigger, not the underlying cause. Without years of arms races, alliances and Balkan instability, the assassination would have been a local crisis, not a world war.
Could the war have been avoided?+
Historians disagree. The alliance system meant escalation was likely once Austria-Hungary chose war with Serbia, but better diplomacy in July 1914 — or German restraint — might have contained it.
How important was Germany's responsibility for WW1?+
The Fischer thesis argues Germany aggressively pursued war for European dominance. Others stress shared responsibility — Austrian belligerence, Russian mobilisation and the alliance system.
What was the Schlieffen Plan?+
Germany's strategy to defeat France quickly through Belgium before turning east to fight Russia. Its commitment to invading Belgium pulled Britain into the war.
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