Year 9 History · History — Making a Better World · 10m read

World War I — Causes (MAIN)

Ever wondered how one gunshot in Serbia sparked a war that killed millions? The MAIN framework breaks down the four root causes: Militarism (massive armies and weapons), Alliances (countries promising to fight together), Imperialism (competing for colonies), and Nationalism (fierce pride in your own country). Learning these shows you how tensions built up across Europe until any spark could cause an explosion—and why understanding history helps us spot warning signs today.

Learning objective: Explain the causes of World War I using the MAIN framework.

By the end of this lesson you can:

• I can define Militarism, Alliances, Imperialism, Nationalism.
• I can explain how the assassination at Sarajevo triggered the war.
• I can evaluate which cause was most significant.

MAIN is a powder keg. Militarism, Alliances, Imperialism and Nationalism filled the keg; Franz Ferdinand's assassination was the spark.

The MAIN causes of WWI

MILITARISM:
• European powers built massive armies and navies in the decades before 1914.
• Germany vs Britain: naval arms race.
• Military planning (e.g., Schlieffen Plan) made war seem inevitable and fast.

ALLIANCES:
• Triple Entente: France, Russia, Britain.
• Triple Alliance: Germany, Austria-Hungary, Italy.
• Meant a local conflict could rapidly pull in all major powers.

IMPERIALISM:
• Competition for colonies in Africa and Asia created tensions.
• Crisis in Morocco (1905, 1911): Germany vs France vs Britain.
• Economic competition fuelled nationalism and resentment.

NATIONALISM:
• Pan-Slavic nationalism in the Balkans threatened Austria-Hungary.
• Serbian nationalism: desire for a "Greater Serbia."
• Assassination of Archduke Franz Ferdinand (28 June 1914, Sarajevo) by Gavrilo Princip.

SPARK:
• Austria-Hungary declared war on Serbia → Russia mobilised → Germany declared war on Russia → France and Britain entered.
• In weeks, local conflict became world war.

AARI TIP: Ask Aari to explain why the alliance system turned a regional dispute into a global war.

MAIN acronym

• M — Militarism: Arms race and glorification of war.
• A — Alliances: Interlocking security pacts.
• I — Imperialism: Colonial competition and rivalry.
• N — Nationalism: Ethnic identity and state rivalry.

Quick reference

| Cause | Meaning |
|---|---|
| Militarism | Arms race |
| Alliances | Triple Entente vs Triple Alliance |
| Imperialism | Competition for colonies |
| Nationalism | Pride and rivalry |
| Trigger | Assassination, Sarajevo, 28 June 1914 |

Worked example (Medium)

How did nationalism in the Balkans contribute to the outbreak of WWI?

1. Background. The Balkans saw rising Serbian nationalism and a desire to unite South Slavic peoples.
2. Trigger. Archduke Franz Ferdinand represented Austrian control over Bosnia — his assassination was a statement against that.
3. Escalation. Austria-Hungary's ultimatum to Serbia was deliberately harsh, ensuring rejection and providing a pretext for war.
4. Domino. Russia's support of Serbia (as fellow Slavs) drew in the alliance system.

Answer: Balkan nationalism provided both the ideology (Pan-Slavism) and the immediate trigger (assassination) that set the alliance system in motion.

Worked example (Hard)

Which of the MAIN causes was the most significant in causing World War I? Construct an argument and support it with specific evidence.

1. Case for Alliances. The alliance system transformed a regional Balkan dispute into a continental war within weeks. Without binding military commitments, Austria-Hungary's attack on Serbia would likely have remained a localised conflict. The "domino effect" — Austria → Serbia → Russia → Germany → France → Britain — was only possible because of formal treaty obligations.
2. Case against Alliances alone. Alliances existed for decades before 1914 without causing world war. They were a mechanism for escalation, not a root cause. Without militarism (the arms race that made war thinkable), imperialism (colonial rivalries that created distrust) and nationalism (the ideology that motivated the assassination), the alliances would not have been triggered.
3. Interconnection. The causes were interdependent: nationalism fuelled imperialism, imperialism intensified rivalry, rivalry drove militarism, and militarism made the alliance system dangerous. No single cause is sufficient on its own.
4. Judgement. The alliance system was the most important MECHANISM — it turned a spark into a conflagration — but nationalism and militarism provided the fuel. A strong argument acknowledges this interdependence while identifying alliances as the critical factor in escalation.

Answer: The alliance system was the most significant cause of the war's SCALE, but it required the fuel of nationalism, imperialism and militarism to be dangerous — the causes were deeply interconnected.

Common mistakes

• Saying the assassination "caused" WWI The assassination of Archduke Franz Ferdinand was a trigger, not a cause. The underlying causes (MAIN) had been building for decades. Without them, the assassination alone would not have led to world war. Fix: Distinguish between long-term causes (MAIN) and the immediate trigger (assassination). Say: "The assassination triggered the war, but the underlying causes made war almost inevitable."
• Treating the MAIN causes as separate and equal Students often list M, A, I, N as four independent causes. In reality, they were deeply interconnected and reinforced each other. Fix: Show connections: "Nationalism fuelled imperialism, which intensified rivalry and drove the arms race (militarism), making the alliance system increasingly dangerous."
• Forgetting that all major powers shared responsibility Students sometimes blame only Germany or only Serbia. All the major powers contributed through their militarism, alliance commitments and imperial ambitions. Fix: Acknowledge shared responsibility while noting specific actions: "Germany's blank cheque to Austria-Hungary and Russia's rapid mobilisation both accelerated the crisis."

The "war guilt" question — who was to blame?

The question of who caused World War I has been debated by historians for over a century. The Treaty of Versailles (1919) placed sole blame on Germany through Article 231 — the infamous "War Guilt Clause." But was this fair?

Fritz Fischer (1961) argued that Germany bore primary responsibility, pointing to evidence that German leaders deliberately provoked war to achieve European dominance. The "blank cheque" — Germany's unconditional promise to support Austria-Hungary against Serbia — was, in Fischer's view, a calculated decision to risk continental war.

Revisionist historians challenged this view. They argued that all the major powers bore responsibility: Russia's rapid mobilisation forced Germany's hand; France wanted revenge for 1871; Britain's commitment to Belgium drew it in; and Austria-Hungary's ultimatum to Serbia was deliberately designed to be unacceptable. In this view, the war was a collective failure of diplomacy.

Christopher Clark (2012) described the leaders of 1914 as *"sleepwalkers"* — not deliberately seeking war but stumbling into it through miscalculation, fear and rigid military planning. The Schlieffen Plan, for instance, required Germany to attack France first through Belgium regardless of the actual dispute, because mobilisation timetables could not be altered once started.

For Year 9 students, the key lesson is that historical causation is rarely simple. Assigning blame requires careful weighing of evidence, and different historians — using the same sources — can reach legitimately different conclusions. This is what makes history an argument, not just a story.

Practice questions

1. Archduke Franz Ferdinand was assassinated in:

   1. Vienna
   2. Berlin
   3. Sarajevo
   4. Paris

   (1 marks)

2. Explain how the alliance system turned a regional dispute into a world war.

   (3 marks)

Summary

• Define Militarism, Alliances, Imperialism, Nationalism.
• Explain how the assassination at Sarajevo triggered the war.
• Evaluate which cause was most significant.