World War I (1914–1918): Causes, Course, Consequences and Impact on India
World War I (1914–18) reshaped the global order: ended four empires, created new nations, spread revolution and produced the punitive peace that made World War II almost inevitable. For India, it produced the Rowlatt Act, Jallianwala Bagh and Gandhi's entry into mass politics.
1. Long-Term Causes: MAIN
Historians conventionally identify four structural causes of World War I, remembered by the acronym MAIN:
M — Militarism: Great powers had built massive armies and navies. The Anglo-German Naval Race (post-1898) was especially destabilising. Generals and military planners had elaborate war plans (Germany's Schlieffen Plan — defeat France in 6 weeks, then turn on Russia) that made mobilisation automatic once triggered.
A — Alliance System: Two armed camps faced each other:
- Triple Alliance (1882): Germany, Austria-Hungary, Italy
- Triple Entente (1907): Britain, France, Russia
These alliances meant a localised conflict could rapidly generalise.
I — Imperialism: European powers competed for colonies, markets and resources globally. The Moroccan Crises (1905, 1911) — Germany challenging French dominance in Morocco — nearly triggered war. Colonial rivalry created chronic hostility.
N — Nationalism: Two forms were destabilising:
- Pan-Germanism and Pan-Slavism — ethnic nationalisms seeking to unify dispersed peoples.
- Balkan nationalism — Serbian, Bulgarian, Romanian aspirations within the Ottoman and Austro-Hungarian empires.
2. Immediate Cause: Assassination at Sarajevo
28 June 1914: Archduke Franz Ferdinand (heir to the Austro-Hungarian throne) and his wife Sophie were assassinated in Sarajevo (Bosnia) by Gavrilo Princip, a Bosnian Serb member of the Black Hand — a secret Serbian nationalist society.
Austria-Hungary blamed Serbia; issued a 48-hour ultimatum with 10 conditions (designed to be unacceptable). Serbia accepted 9 of 10. Austria-Hungary declared war on Serbia (28 July). The alliance system activated:
- Russia mobilised to support Serbia.
- Germany declared war on Russia (1 August) and France (3 August).
- Germany invaded Belgium (4 August) to execute the Schlieffen Plan.
- Britain declared war on Germany (4 August) — the invasion of neutral Belgium was the trigger.
3. Course of the War
Western Front: German advance through Belgium and France stopped at the Battle of the Marne (September 1914). The war then settled into trench warfare — four years of attrition with millions of casualties for minimal territorial gain.
Eastern Front: More fluid; Germany defeated Russia repeatedly (Tannenberg 1914); the Russian Revolution (1917) knocked Russia out.
Other theatres:
- Gallipoli (1915): British-Anzac attempt to knock Ottoman Turkey out of the war — disastrous failure (Churchill's plan).
- Mesopotamia/Palestine: Britain's campaigns against Ottoman Turkey.
- Sea War: German submarine warfare; sinking of RMS Lusitania (1915) outraged America.
USA enters (April 1917): Triggered by German unrestricted submarine warfare and the Zimmermann Telegram (Germany proposing Mexico attack the USA).
End: Germany's allies collapsed; Germany signed the Armistice (11 November 1918, 11 a.m. — "the eleventh hour of the eleventh day of the eleventh month").
4. The Paris Peace Settlement
The Treaty of Versailles (June 1919) with Germany was the most important:
- War guilt clause (Article 231): Germany accepted sole responsibility for the war.
- Reparations: $33 billion (later set at $33bn) — never fully paid.
- Territorial losses: Alsace-Lorraine returned to France; Rhineland demilitarised; colonies distributed as League of Nations mandates; Poland created from German, Austrian and Russian territory.
- Military restrictions: German army limited to 100,000; no air force; no submarines.
- League of Nations created (Woodrow Wilson's 14 Points); USA ironically did not join (Senate refused).
Consequences for post-war world:
- Versailles humiliated Germany without destroying it — created the "stab in the back" myth that Hitler exploited.
- Ottoman Empire dissolved → Turkey (Kemal Atatürk); Arab mandates (Britain got Iraq, Palestine, Jordan; France got Syria, Lebanon) — seeds of Middle East's modern conflicts.
- Austria-Hungary dissolved → Austria, Hungary, Czechoslovakia, Yugoslavia.
- Russian Revolution — Tsar overthrown (February 1917), Bolsheviks take power (October 1917).
5. Impact on India
India contributed massively to WWI:
- 1.5 million Indian soldiers fought on various fronts.
- 100,000+ Indian soldiers died.
- India contributed £100 million to British war costs.
What Indians expected: Self-governance after loyal war service.
What they got:
- Rowlatt Act 1919: Emergency powers to detain without trial, suppress "seditious" activity — passed despite unanimous Indian opposition in the legislature. Triggered nationwide protests.
- Jallianwala Bagh Massacre (April 13, 1919): General Dyer fired on a peaceful crowd at Amritsar without warning; 379+ killed (official; actual figures much higher), 1,200+ wounded.
- Montagu-Chelmsford Reforms (Government of India Act 1919): Partial concession — "Dyarchy" in provinces (Indians get some provincial portfolios); elected majority in legislatures; but still no responsible government.
The betrayal after WWI directly propelled Gandhi into mass politics — the Non-Cooperation Movement (1920) was India's response.
6. UPSC Relevance
Prelims: Assassination date = 28 June 1914; Treaty of Versailles = June 1919; India's contribution = 1.5 million soldiers; Rowlatt Act = 1919; Jallianwala Bagh = 13 April 1919; League of Nations proposed by Wilson.
Mains GS1: "World War I broke four empires but did not deliver the peace it promised." Discuss. | Analyse the impact of World War I on Indian nationalism. | Was the Treaty of Versailles the cause of World War II?
Frequently Asked Questions
What were the MAIN causes of World War I?
Militarism, Alliances, Imperialism and Nationalism (MAIN), with the assassination of Archduke Franz Ferdinand at Sarajevo in 1914 as the immediate trigger.
What was trench warfare?
The static, attritional style of fighting on the Western Front, where armies dug lines of trenches and suffered heavy casualties for little gain.
What was the Treaty of Versailles?
The 1919 treaty that ended the war with Germany, imposing heavy reparations and territorial losses and sowing seeds of future conflict.
How did World War I affect India?
India contributed troops and resources; wartime hardship, the Rowlatt Act and unmet expectations fuelled the national movement.
Sources and Further Reading
According to standard UPSC references and NCERT texts, the war is studied through treaties, official records and standard world histories.
- Treaty of Versailles (1919).
- NCERT, Themes in World History and Modern India.