World War 1

Intro to World War 1 (1914-1918)

  • First global war centred in Europe, triggered by the assassination of Archduke Franz Ferdinand of Austria-Hungary on 28 June 1914.
  • Involved 2 major alliances: Allied Powers (Triple Entente) & Central Powers.
  • Fought in 3 fronts: Western, Eastern & Balkan; introduced trench warfare, tanks, chemical weapons.
  • Ended with Armistice (11 Nov 1918) & Treaty of Versailles (28 June 1919).
  • Casualties: ≈ 1.5 crore (1 crore = 10 million) total; 70 lakh military deaths + 80 lakh civilian deaths.

Major Causes (M.A.I.N.)

CauseDescription
MilitarismArms race—Germany & Britain built navies; standing armies doubled 1890-1914.
AlliancesTriple Alliance (1882) vs Triple Entente (1907) divided Europe.
ImperialismScramble for colonies—Morocco crises (1905, 1911) heightened tensions.
NationalismPan-Slavism & Serbian nationalism vs Austro-Hungarian dominance.

Immediate Spark

  • 28 June 1914: Archduke Franz Ferdinand (heir to Austro-Hungarian throne) & wife Sophie assassinated in Sarajevo by Gavrilo Princip (member of Black Hand, a Serbian nationalist group).

Timeline at a Glance

YearKey Events
191428 Jun – Assassination; 28 Jul – Austria declares war on Serbia; 4 Aug – Germany invades Belgium (Schlieffen Plan); 5 Sep–10 Sep – 1st Battle of Marne (trench war begins).
191522 Apr – 1st poison-gas attack at 2nd Battle of Ypres; 7 May – Lusitania sunk; Italy joins Allies.
1916Feb–Dec – Battle of Verdun (France vs Germany, ≈7 lakh casualties); Jul–Nov – Battle of the Somme (1 Jul – British lose 60,000 in 1 day).
19176 Apr – USA enters war (unrestricted submarine warfare & Zimmermann Telegram); 7 Nov – Bolshevik Revolution – Russia exits war (Treaty of Brest-Litovsk, 3 Mar 1918).
191821 Mar – Germany’s Spring Offensive; 8 Aug – Hundred Days Offensive (Allied push); 11 Nov – Armistice (11-11-11: 11 am, 11 Nov).
191928 June – Treaty of Versailles signed (exactly 5 years after assassination).

Principal Opponents

Allied Powers (Entente)Central Powers
Britain + Dominions (Canada, India, Australia…)Germany (Kaiser Wilhelm II)
France (Third Republic)Austria-Hungary (Emperor Franz Joseph → Charles I)
Russia (till 1917)Ottoman Empire (Sultan Mehmed V → VI)
Italy (from 1915)Bulgaria (from 1915)
USA (from 1917)

War Technology & Firsts

InnovationYear / Fact
Tank1st used by British at Flers-Courcelette (Somme) 15 Sep 1916—Mk I “Little Willie”.
Chemical weaponsChlorine gas 1915; later phosgene & mustard gas; 1.2 million gas casualties.
Barbed wire & machine gunsCaused huge stalemate on Western Front.
Air warfare1st fighter planes (Fokker Eindecker 1915); Red Baron (Manfred von Richthofen) scored 80 kills.
Convoy systemIntroduced by Allies 1917 to beat U-boats.

India & WW1

  • 13 lakh Indian soldiers served; 74,000 killed; 11 Victoria Crosses.
  • Fought in France, Belgium, Mesopotamia, Gallipoli, East Africa.
  • Imperial War Conference 1917 – India represented as separate signatory → step toward self-governance.

Important Personalities

NameRole
Archduke Franz FerdinandHis death triggered war.
Kaiser Wilhelm IIGerman Emperor, abdicated 9 Nov 1918.
General Helmuth von MoltkeModified Schlieffen Plan.
Field-Marshal Douglas HaigBritish C-in-C Western Front (Somme).
Marshal Ferdinand FochAllied Supreme Commander 1918.
Woodrow WilsonUS President, 14-Point Plan, League of Nations.
David Lloyd GeorgeBritish PM during 2nd half of war.
Mustafa Kemal AtatürkDefended Gallipoli; later founded Turkey.

Results & Treaties

TreatyDate / WithKey Clauses
Treaty of Versailles28 June 1919 – GermanyWar-guilt clause (Article 231), Reparations (£6,600 million), Rhineland demilitarised, Army capped at 1 lakh, loss of 13% territory, 10% population, all colonies.
Saint-Germain1919 – AustriaDissolved Austro-Hungarian Empire.
Trianon1920 – Hungary2/3 territory lost.
Sèvres / Lausanne1920/23 – Ottoman Empire → Turkey.

Quick-Reference Tables

1. Deadliest Battles
BattleYearApprox. Casualties
Brusilov Offensive191615 lakh
Battle of the Somme191612 lakh
Verdun19167 lakh
Passchendaele (3rd Ypres)19175 lakh
2. War Expenditure & Casualties
CountryMilitary DeathsTotal Casualties% of Mobilised
Germany20 lakh70 lakh65%
Russia17 lakh90 lakh76%
France14 lakh66 lakh73%
British Empire9 lakh32 lakh36%
Austria-Hungary12 lakh70 lakh90%
USA1.16 lakh3.2 lakh8%

One-Liner Revision Facts

  • WW1 lasted 4 years, 3 months, 1 week.
  • Germany & Austria-Hungary were the first to declare war (28 Jul 1914).
  • Tanks were code-named “Water Tanks” to hide identity.
  • Christmas Truce 1914 – soldiers played football in no-man’s-land.
  • Zimmermann Telegram promised Mexico US territory if it sided with Germany.
  • Article 231 – “War-Guilt” clause blamed Germany solely.
  • League of Nations born 1920 (USA never joined).
  • Ottoman Empire ended after 600 years; Turkey became republic 1923.
  • Indian battalions won 6 battle honours including “Neuve-Chapelle”.
  • 11 November observed as Remembrance / Poppy Day.

Practice MCQs (Railway Pattern)

1. Which event directly triggered World War I?**Answer:** Assassination of Archduke Franz Ferdinand in Sarajevo (28 June 1914).
2. The first use of tanks in battle occurred at which location?**Answer:** Flers-Courcelette (Somme), 15 September 1916.