1. Ideological Roots of the War
The First World War did not erupt out of nowhere. By 1914, Europe had spent more than six decades accumulating ideological, economic, and military tensions. At the deepest level, three powerful ideologies had converged to make a continental war almost inevitable.
๐ง Nationalism
The dominant belief of 19th-century Europe held that every nation had the right to form its own sovereign state. Language, culture, and history were treated as the natural basis for political borders.
- ๐ฉ๐ช The German people built the German Empire in 1871 after unifying the German states.
- ๐ฎ๐น Italian nationalists created the Kingdom of Italy in 1861.
- ๐ท๐ธ In the Balkans, smaller peoples such as the Serbs and Croats longed to break free from multi-ethnic empires.
๐ก Memory Aid: "Nationalism = One nation, one state." German speakers, for example, all belonged in the German Empire.
๐ฆ Social Darwinism
In 1859 Charles Darwin published On the Origin of Species, introducing the idea of "survival of the fittest". European statesmen and thinkers later misapplied this biological idea to human society and international politics.
"Strong nations expand โ Weak nations are naturallyๆทๆฑฐ โ Justified" โ (A dangerous misconception!)
โ๏ธ Militarism
Many powers came to believe that military strength equalled national prestige. The result was an arms race that pushed Europe closer to war.
- Germany drafted the Schlieffen Plan (1905) for a two-front war.
- Britain launched the all-big-gun HMS Dreadnought (1906), triggering a battleship race.
- Every great power was preparing for the day the guns would go off.
2. Economic Roots: Shifts in National Strength
After the Second Industrial Revolution took hold in the 1870s, the map of European power was redrawn.
๐ Industrial Output of the Great Powers in 1900
| Country | Industrial Output Index | Notes |
| ๐บ๐ธ United States | 4 (the strongest) | Rising newcomer, world leader |
| ๐ฉ๐ช Germany | 3 (catching up fast) | Industrialised quickly after 1871 unification |
| ๐ฌ๐ง Britain | 3 (traditional้ธไธป) | "Workshop of the World" status challenged |
| ๐ท๐บ Russia | 3 | Agriculture-based, slow industrialisation |
| ๐ซ๐ท France | 2 | Weakened by the 1871 Franco-Prussian War |
| ๐ฏ๐ต Japan | 1 | Just beginning after the Meiji Restoration |
๐ฅ Key Tension: Germany's industrial output overtook Britain's around 1900, yet the world had already been carved up between Britain and France. Germany demanded its "Place in the Sun", and the stage was set for confrontation.
๐ Scramble for the World
The late 19th century is often called the Age of Imperialism.
- ๐ฌ๐ง๐ซ๐ท The British and French empires divided most of Africa.
- ๐ฉ๐ช Germany arrived late and demanded a redivision.
- ๐ฏ๐ต Japan joined the race and invaded China after the 1895 Sino-Japanese War.
3. The Alliance System: Two Armed Camps
๐ Formation of the Central Powers
1873 โ Three Emperors' League (Germany, Austria-Hungary, Russia)
1879 โ Dual Alliance (GermanyโAustria-Hungary; Russia dropped out)
1882 โ Triple Alliance signed (Germany, Austria-Hungary, Italy)
๐ Formation of the Allied Powers
1904 โ Entente Cordiale (BritainโFrance)
1907 โ Anglo-Russian Entente (Triple Entente: Britain, France, Russia)
โก Fatal Consequence: Europe had split into two opposing military blocs. Once any one country was attacked, its allies were obliged to fight. A small spark in the Balkans was enough to set the whole continent ablaze.
4. The Spark: The Sarajevo Incident (28 June 1914)
๐ The Balkan Powder Keg
The Balkan Peninsula was a tangle of competing peoples โ Serbs, Croats, Bosniaks and others โ many of whom wanted independence from the Ottoman and Austro-Hungarian empires. The area earned the reputation as the "Powder Keg of Europe".
๐ฅ The Assassination at Sarajevo
- Date: 28 June 1914
- Place: Sarajevo, the capital of Bosnia-Herzegovina (then ruled by Austria-Hungary)
- Victims: Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie
- Assassin: Gavrilo Princip, a young Bosnian Serb nationalist supplied by a Serbian nationalist network
๐ Why 28 June? It was a national "day of mourning" for Serbia, marking the 1389 Battle of Kosovo against the Ottoman Turks. The assassin deliberately intended to humiliate Austria-Hungary on this symbolic date.
โ๏ธ Chain Reaction
Sarajevo assassinationโ
Austria-Hungary declares war on Serbiaโ
Russia mobilises to defend Serbiaโ
Germany backs Austria-Hungaryโ
Britain and France back Russiaโ
World war erupts
5. Course of the War
๐ช The Two Camps
| Central Powers | Allied Powers |
| ๐ฉ๐ช German Empire | ๐ฌ๐ง British Empire |
| ๐ฆ๐น Austria-Hungary | ๐ซ๐ท French Third Republic |
| ๐น๐ท Ottoman Empire | ๐ท๐บ Russian Empire |
| (later joined: Bulgaria) | ๐ฎ๐น Italy switched sides in 1915 |
| ๐บ๐ธ United States entered in 1917 |
โ๏ธ The Schlieffen Plan
German Chief of Staff Alfred von Schlieffen devised the plan in 1905.
- Phase 1: Knock France out of the war in six weeks by sweeping through Belgium.
- Phase 2: Turn east and defeat Russia, whose army was assumed to mobilise slowly.
โ Plan Failed: Russia mobilised faster than expected, forcing Germany to fight on two fronts. The hoped-for quick victory turned into a long, grinding war.
๐ณ๏ธ Trench Warfare on the Western Front
From late 1914 the Western Front in France and Belgium became a continuous line of opposing trenches.
- Soldiers lived, fought and died in muddy ditches; whoever showed up was shot.
- The Battle of Verdun (1916) cost the French 540,000 casualties and the Germans 430,000.
- The Battle of the Somme (1916) saw British forces suffer 57,000 casualties on the first day alone โ the bloodiest day in British military history.
๐ New Weapons of Mass Destruction
| Weapon | First Major Use | Notes |
| โ ๏ธ Poison gas | 22 April 1915, Second Battle of Ypres | First deployed by Germany |
| ๐ก๏ธ Tank | Battle of the Somme, 1916 | Introduced by Britain |
| โ๏ธ Aircraft | Reconnaissance โ air combat | By late war, dogfights were routine |
| ๐ข Submarine | German U-boat campaign | "Unrestricted" submarine warfare from 1917 |
๐บ๐ธ Turning Point: American Entry
On
6 April 1917 the United States declared war on Germany. Two events pushed Washington into the fight:
- Germany's resumption of unrestricted submarine warfare, which had already sunk the liner RMS Lusitania in 1915 with American passengers on board.
- The Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the United States.
๐ณ End of the War
- 11 November 1918: Germany signed an armistice and surrendered unconditionally.
- Total deaths: about 17 million (military and civilian combined).
- It had been called "the war to end all wars" โ an optimism that would be shattered within a generation.
6. Aftermath: The Treaty of Versailles (1919)
๐ From the Paris Peace Conference to Versailles
- Date: 28 June 1919 โ signed in the Hall of Mirrors at the Palace of Versailles
- Big Three: Britain (Lloyd George), France (Clemenceau), United States (Wilson)
- Russia was not invited; the defeated powers had no to negotiate.
โ๏ธ The Harsh Terms Imposed on Germany
1๏ธโฃ Territorial Losses
- ๐ซ๐ท Alsace-Lorraine returned to France.
- ๐ต๐ฑ Poland was reconstituted; Germany ceded Poznaล and the Polish Corridor, which cut off East Prussia from the rest of Germany.
- ๐ง๐ช๐ฉ๐ฐ Eupen-Malmedy went to Belgium; North Schleswig to Denmark.
- ๐ All overseas colonies were confiscated and redistributed as League of Nations mandates.
2๏ธโฃ Military Restrictions
- The army was capped at 100,000 men.
- No new warships could be built.
- Germany was forbidden to possess heavy artillery, tanks, poison gas or military aircraft.
- The Rhineland was demilitarised.
3๏ธโฃ War Reparations
Total bill: 132 billion gold marks
The burden drove Germany into hyperinflation โ by late 1923 one US dollar was worth 4.2 trillion marks.
โ ๏ธ Historical Verdict: The Treaty was widely regarded as too harsh. It humiliated Germany and planted the seeds of a second, even more destructive war. As the saying goes, the victors "sowed the dragon and reaped the flea".
7. Impact on China: The Shandong Question and the May Fourth Movement
๐จ๐ณ The Shandong Question
At the Paris Peace Conference China expected the German concessions in Shandong to be returned to Chinese sovereignty. Instead, Britain, France and the United States โ eager to keep Japan on side โ secretly agreed to transfer those privileges to Japan.
๐ฅ In 1919 China was treated as a defeated power despite having fought on the winning side.
๐ข The May Fourth Movement (4 May 1919)
- Outbreak: On 4 May 1919 about 3,000 students rallied in Beijing to protest the Shandong decision.
- Slogans: "Recover Qingdao!" "Oppose foreign powers, punish domestic traitors!"
- Aftermath: A wave of strikes by workers and boycotts by merchants forced the Chinese delegation to refuse to sign the Treaty of Versailles.
- Legacy: It marked the political awakening of modern Chinese intellectuals and helped launch the New Culture Movement.
8. Seeds of the Second: The Rise of Fascism
๐ฅ Why Did Fascism Rise?
1๏ธโฃ Resentment over Versailles
Many Germans felt the treaty was a dictate of revenge. The "war guilt" clause (Article 231) became a national humiliation.
2๏ธโฃ The Great Depression (1929โ1933)
The Wall Street Crash of 1929 triggered a global slump. German unemployment climbed to roughly 30%.
3๏ธโฃ Political Instability
The Weimar Republic (1919โ1933) suffered from weak coalitions and frequent changes of government, leaving democracy vulnerable.
๐ฏ Defining Features of Fascism
| Feature | How It Appeared in Practice |
| Extreme nationalism | Glory of the nation and racial superiority |
| Authoritarian rule | Rejection of liberal democracy in favour of one-party rule |
| Militarism | Belief that disputes should be settled by force |
| Anti-communism | Vigorous suppression of the political left |
โ ๏ธ The Three Fascist Powers: ๐ฉ๐ช Adolf Hitler came to power in 1933 โ ๐ฎ๐น Benito Mussolini from 1922 โ ๐ฏ๐ต Japanese militarists dominated Tokyo from the early 1930s.
9. International Organisations: From the League of Nations to the United Nations
๐ The League of Nations (1919โ1946)
- Founding members: Britain, France, Japan, Italy โ and China was among the original members.
- Aim: To maintain world peace through collective security.
- Reasons for Failure:
- โ It had no armed forces of its own, so sanctions were hollow.
- โ Decisions required unanimous agreement, which let any member veto action.
- โ The United States never joined โ the US Senate refused to ratify the Treaty of Versailles.
- โ Soviet Russia and Germany were excluded, leaving major powers outside.
- โ It proved powerless against Japan's seizure of Manchuria (1931) and Italy's invasion of Ethiopia (1935).
๐ The United Nations (founded 1945)
- Established: 24 October 1945
- Headquarters: New York City, USA
- Six Principal Organs:
- General Assembly
- Security Council โ five permanent members: USA, UK, France, Russia, China
- Economic and Social Council (ECOSOC)
- Trusteeship Council (now suspended)
- International Court of Justice (ICJ)
- Secretariat
- Purposes: Maintain international peace and security; promote international cooperation; develop international law.
| Aspect | League of Nations | United Nations |
| Founded | 1920 | 1945 |
| Headquarters | Geneva | New York |
| United States | Never joined | Founding member |
| Armed forces | None | Peacekeeping forces |
| Decision-making | Unanimous required | Majority vote; five permanent members hold veto power |
๐ Chapter Summary
๐ฏ The WWI Causal Chain (for revision)
Nationalism+
Social Darwinism+
Militarismโ
Economic rivalryโ
Two armed blocsโ
Sarajevo sparkโ
World War eruptsโ
Versaillesโ
Fascism risesโ
Seeds of WWII
๐ก Key Memory Aids
๐ฏ The Three "-isms" = "N-D-M"
- Nationalism โ one nation, one state
- Social Darwinism โ might makes right
- Militarism โ military solutions first
๐ฏ The Two Blocs
- Central Powers: Germany, Austria-Hungary, Ottoman Empire โ the "three central" empires
- Allied Powers: Britain, France, Russia (later Italy and the USA) โ the "Triple Entente"
๐ฏ The Three "Knives" of Versailles
- Lost territory (Alsace-Lorraine, overseas colonies)
- Capped military (army limited to 100,000)
- Crushing reparations (132 billion gold marks)
๐ Timeline of Key Dates
1871 โ German unification
1882 โ Triple Alliance signed
1907 โ Anglo-Russian Entente; two blocs fully formed
1914.6.28 โ Sarajevo assassination
1914.8 โ Central Powers and Allies officially at war
1915.4.22 โ First large-scale use of poison gas at Ypres
1917.4.6 โ United States enters the war
1918.11.11 โ Germany surrenders; First World War ends
1919.5.4 โ May Fourth Movement in China
1919.6.28 โ Treaty of Versailles signed
1920 โ League of Nations begins work
1929โ33 โ Great Depression
1933 โ Hitler becomes German Chancellor
โ Common DSE-style Questions
- Explain the long-term causes of the First World War. (4โ5 marks)
- How did the Sarajevo incident trigger a world war?
- Describe the territorial, military and economic terms imposed on Germany at Versailles.
- Why did the May Fourth Movement break out, and what was its significance?
- Why did the League of Nations fail to preserve peace?
- How did the Treaty of Versailles plant the seeds of the Second World War?
โก A Historical Reflection
"World War I was supposed to be 'the war to end all wars'" โ US President Woodrow Wilson.
Yet only twenty years later, in 1939, an even larger and more devastating Second World War broke out.
Historical lesson: When victors humiliate the defeated rather than reconcile with them, they sow the seeds of an even greater conflict.
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