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World War I

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1

Learn the Concept

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World War I (1914–18), the "Great War", was the first global, industrialised war, which shattered the old European order and reshaped the modern world. Fix the significance: its deep causes lay in militarism, the alliance system, imperialism and nationalism (the "MAIN" causes), with the immediate spark being the assassination of Archduke Franz Ferdinand at Sarajevo (1914). Fought between the Allied Powers and the Central Powers with devastating new technology (machine guns, poison gas, tanks, trench warfare), it caused unprecedented casualties, brought down four empires, led to the Russian Revolution, and ended with the Treaty of Versailles (1919) and the League of Nations — while its harsh peace sowed the seeds of the Second World War.

In One Line
  • Causes (MAIN): Militarism, Alliances, Imperialism, Nationalism.
  • Spark: assassination of Archduke Franz Ferdinand at Sarajevo (28 June 1914).
  • Sides: Allied Powers (Britain, France, Russia, later USA, Italy) vs. Central Powers (Germany, Austria-Hungary, Ottoman Empire).
  • End: Allied victory (1918); Treaty of Versailles (1919); League of Nations; collapse of four empires.
Glossary (define-on-first-use)
  • MAIN causes: Militarism, Alliances, Imperialism, Nationalism — the long-term causes of WWI.
  • Alliance system: the rival blocs (Triple Alliance vs. Triple Entente) that turned a local crisis into a world war.
  • Trench warfare: the static, attritional fighting of the Western Front.
  • Treaty of Versailles (1919): the peace treaty that penalised Germany.
  • League of Nations: the post-war body created to preserve peace.

1. Causes

  • The long-term causes are summed up as "MAIN": Militarism (arms race, glorification of war), the Alliance system (Triple Alliance — Germany, Austria-Hungary, Italy; vs. the Triple Entente — Britain, France, Russia), Imperialism (colonial rivalry) and Nationalism (including in the Balkans, the "powder keg of Europe"). The immediate cause was the assassination of Archduke Franz Ferdinand of Austria at Sarajevo (28 June 1914).

2. Course of the war

  • The alliance system dragged the powers in: the war pitted the Allied Powers (Britain, France, Russia; later Italy and the USA, 1917) against the Central Powers (Germany, Austria-Hungary, the Ottoman Empire). It was marked by brutal trench warfare on the Western Front and devastating new weapons — machine guns, poison gas, tanks, submarines, aircraft. Russia withdrew (1917 Revolution), but the entry of the USA (1917) tipped the balance toward the Allies.

3. End & the peace

  • Germany sued for an armistice on 11 November 1918. The Paris Peace Conference produced the Treaty of Versailles (1919), which imposed on Germany harsh terms — war-guilt, huge reparations, loss of territory and colonies, and disarmament. The League of Nations was created to prevent future wars.

4. Consequences

  • The war caused unprecedented death and destruction, and brought down four empires (German, Austro-Hungarian, Russian/Tsarist and Ottoman), redrawing the map with new nation-states. It triggered the Russian Revolution, shook European dominance, and stimulated anti-colonial nationalism (in India too). But the harsh, resentment-breeding peace of Versailles, economic dislocation and the weakness of the League sowed the seeds of the Second World War.
ElementDetail
CausesMAIN (Militarism, Alliances, Imperialism, Nationalism)
SparkSarajevo assassination (1914)
Turning pointUS entry (1917); Russia exits (1917)
EndArmistice (1918); Treaty of Versailles (1919)
Key Facts to Remember
  • Causes = MAIN (Militarism, Alliances, Imperialism, Nationalism); Balkans = "powder keg".
  • Spark = assassination of Archduke Franz Ferdinand at Sarajevo (1914).
  • Allies (Britain, France, Russia; later USA & Italy) vs. Central Powers (Germany, Austria-Hungary, Ottomans).
  • New warfare: trenches, machine guns, poison gas, tanks; US entry (1917) decisive.
  • End: armistice (11 Nov 1918); Treaty of Versailles (1919); League of Nations; four empires fell.
Connect the Dots
  • Unification of Germany & imperialism: the rivalries behind WWI (earlier leaves).
  • Russian Revolution: triggered by the war (next leaf).
  • Treaty systems & the League of Nations: the post-war order (later leaf).
  • World War II: the harsh peace that led to it.
2

Prepare for the Exam — Prelims

Prelims

Tested on the MAIN causes, the Sarajevo spark (1914), the two sides, US entry (1917), and the Treaty of Versailles (1919).

High-probability areas
  • MAIN causes: Militarism, Alliances, Imperialism, Nationalism.
  • Spark = Sarajevo assassination of Franz Ferdinand (1914).
  • Allies vs. Central Powers; US entry (1917).
  • Armistice 11 Nov 1918; Treaty of Versailles (1919).
  • Four empires fell; League of Nations created.
Common traps
  • Immediate cause = Sarajevo (1914); long-term = MAIN.
  • Central Powers = Germany, Austria-Hungary, Ottomans (Italy later joined the Allies).
  • USA entered in 1917; Russia exited in 1917.
  • Treaty of Versailles = 1919 (penalised Germany).
Revision tip: MAIN causes + Sarajevo spark → 1917 (US in, Russia out) → 1918 armistice → 1919 Versailles.
2

Prepare for the Exam — Mains

Mains

GS Paper I (world history). The examiner rewards analysing the causes and consequences of WWI.

Likely question types
  • Examine the causes of the First World War. (15)
  • Discuss the consequences of the First World War. (15)
  • How did the alliance system turn a local crisis into a world war? (10)
  • Assess the Treaty of Versailles. (10)
Dimensions to cover
  • Causes: MAIN + spark.
  • Course: trenches, US entry.
  • Peace: Versailles, League.
  • Consequences: empires fall, WWII seeds.
Value-additions
  • Cite the Balkan "powder keg".
  • Note the fall of four empires.
  • Link harsh peace to WWII.
3

How to Write the Answer

Mains
Worked example — decoding the question

"The First World War was caused by deep structural rivalries, not merely a single assassination." Discuss. (15)
"Discuss" = weigh the MAIN causes against the immediate spark.

Introduction · ~20%
Distinguish the long-term (MAIN) causes from the immediate spark.
Body · ~60%
Militarism, alliances, imperialism, nationalism (Balkans); the Sarajevo assassination and how the alliance system globalised the war; course and the Versailles peace.
Conclusion · ~20%
The assassination lit a fire long prepared by structural rivalries.
10-mark: ~150 words · ~7 min
15-mark: ~250 words · ~12 min
Common mistakes
  • Reducing the war to the assassination alone.
  • Wrong side for Italy/Ottomans.
  • Confusing Versailles' date.
Model opening line: "A single shot at Sarajevo set Europe ablaze — but the kindling had been piled high for decades."
4

Prelims Questions

Prelims

30 interactive MCQs — previous-year questions are included and tagged with their year. Select an answer for instant feedback and an explanation; your score is tracked and you can review wrong answers at the end.

Practice set
Question 1 of 30
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5

Mains Questions

Mains

15 mains questions — previous-year questions are included and tagged. Write a full answer, then click Evaluate My Answer for paragraph-level feedback. Reveal the model structure after you attempt.

15 marks · ~250 words · ~11 min
Examine the causes of the First World War.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

15 marks · ~250 words · ~11 min
Discuss the consequences of the First World War.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
How did the alliance system turn a local crisis into a world war?
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Assess the Treaty of Versailles.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

15 marks · ~250 words · ~11 min
'The First World War was caused by deep structural rivalries, not merely a single assassination.' Discuss.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Describe the role of militarism and the arms race.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Examine the significance of the US entry into WWI.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

15 marks · ~250 words · ~11 min
How did the First World War reshape the map and politics of the world?
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Discuss the impact of WWI on the colonies and nationalism.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Explain why the Balkans were the 'powder keg of Europe'.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

15 marks · ~250 words · ~11 min
How did the peace settlement of WWI sow the seeds of WWII?
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Describe the new nature of warfare in WWI.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Assess the collapse of the four empires after WWI.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

15 marks · ~250 words · ~11 min
Evaluate the First World War as a turning point in world history.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

10 marks · ~150 words · ~7 min
Discuss the creation and purpose of the League of Nations.
Evaluate My Answer
Model answer structure

Intro: define the key term and give a one-line context hook.
Body 1: conceptual / historical basis with a named fact, date or example.
Body 2: evidence and analysis — sites, inscriptions, coins, archaeologists.
Body 3: limitations or the counter-view (balanced).
Conclusion: a specific, reasoned judgment / way forward.

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