World History: Revolutions and World Wars Notes
Complete notes on world history for exams: the American, French, Industrial and Russian revolutions, both World Wars, their treaties, leaders and key dates.
By GK24 Editorial Team· Published · 6 min read

Between 1776 and 1945 the modern world was made twice over: first by four revolutions that destroyed monarchy, feudal privilege, handicraft production and tsarist autocracy, and then by two wars that destroyed the empires the revolutions had left standing. Competitive examinations draw a steady six to ten questions a year from this stretch of world history because it is made of hard facts, a date, a treaty, a leader, a slogan, that can be asked in one line. The notes below take the revolutions in order and then the two wars, and every fact in them is one that has appeared in a paper.
The American Revolution, 1775 to 1783
Thirteen British colonies on the Atlantic coast of North America resented being taxed by a Parliament in which they were not represented, and the cry of no taxation without representation became the slogan of the resistance. The Stamp Act of 1765 and the tea duty led to the Boston Tea Party of 1773, when colonists threw chests of East India Company tea into Boston harbour. Fighting began at Lexington in 1775. The Continental Congress adopted the Declaration of Independence on 4 July 1776, drafted mainly by Thomas Jefferson, and George Washington commanded the colonial army. The victory at Saratoga in 1777 brought France into the war on the American side, the British surrendered at Yorktown in 1781, and the Treaty of Paris of 1783 recognised the independence of the United States. Washington became the first President in 1789.
The French Revolution, 1789
France in 1789 was divided into three estates, and the burden of taxation fell on the third estate of peasants, artisans and the middle class while the clergy and the nobility were exempt. The writings of Rousseau, whose book The Social Contract argued that sovereignty belongs to the people, of Montesquieu, who proposed the separation of powers in The Spirit of the Laws, and of Voltaire gave the discontent a language. Louis XVI summoned the Estates-General in May 1789 for the first time since 1614; the third estate declared itself the National Assembly and took the Tennis Court Oath in June; and on 14 July 1789 a crowd stormed the Bastille, the date now celebrated as the French national day. The Declaration of the Rights of Man and of the Citizen followed in August 1789, feudal privileges were abolished, Louis XVI was executed in January 1793, and the Reign of Terror of 1793 and 1794 was directed by Robespierre through the Committee of Public Safety. Napoleon Bonaparte seized power in 1799 and crowned himself emperor in 1804. Liberty, Equality and Fraternity, the motto of the revolution, became the vocabulary of nationalism across Europe.
The Industrial Revolution
The Industrial Revolution began in Britain in the second half of the eighteenth century, where coal, iron, colonial markets and capital came together. Textiles led the way: John Kay invented the flying shuttle in 1733, James Hargreaves the spinning jenny in 1764, Richard Arkwright the water frame and Edmund Cartwright the power loom. James Watt improved the steam engine, patenting his separate condenser in 1769, and steam turned factories, railways and ships. George Stephenson built the locomotive Rocket, and the first public railway ran from Stockton to Darlington in 1825. The social results were the factory system, crowded industrial cities, child labour and, in answer to them, trade unions and socialist thought, including the Communist Manifesto of Karl Marx and Friedrich Engels in 1848.
The Russian Revolution, 1917
Tsarist Russia entered the twentieth century with an autocratic monarchy, a hungry peasantry and a small but militant industrial working class. The firing on a peaceful procession in St Petersburg on Bloody Sunday in 1905 produced the first revolution, which won a Duma but no real democracy. Defeat in the First World War broke the regime. The February Revolution, which took place in March 1917 by the Western calendar, forced Tsar Nicholas II to abdicate and set up a provisional government under Kerensky. Lenin returned from exile with the slogan of Peace, Land and Bread and the demand for all power to the soviets. In the October Revolution, carried out on 7 November 1917 by the Western calendar, the Bolsheviks seized power in Petrograd, with Leon Trotsky organising the Red Guards. Russia left the war by the Treaty of Brest-Litovsk in 1918, and the Union of Soviet Socialist Republics was formed in 1922.
The First World War, 1914 to 1918
The war grew out of militarism, the system of alliances, imperial rivalry over colonies and aggressive nationalism in the Balkans. Its immediate cause was the assassination of Archduke Franz Ferdinand of Austria-Hungary at Sarajevo on 28 June 1914 by Gavrilo Princip. Austria-Hungary declared war on Serbia on 28 July 1914 and the alliances pulled in the rest of Europe. The Central Powers were Germany, Austria-Hungary, the Ottoman Empire and Bulgaria; the Allies were Britain, France, Russia, later Italy, and the United States, which entered in 1917 after German submarine warfare and the sinking of the Lusitania. The armistice was signed on 11 November 1918. The Treaty of Versailles, signed on 28 June 1919, held Germany guilty of the war, took away its colonies, limited its army and imposed reparations. The League of Nations, proposed in the Fourteen Points of President Woodrow Wilson, began work in 1920 with its headquarters at Geneva.
| Event | Year | Point to remember |
|---|---|---|
| Declaration of Independence | 1776 | Adopted on 4 July, drafted by Thomas Jefferson |
| Storming of the Bastille | 1789 | 14 July; French national day |
| October Revolution | 1917 | Bolsheviks under Lenin take power in Petrograd |
| Treaty of Versailles | 1919 | Signed on 28 June; ended the First World War |
| Second World War begins | 1939 | German invasion of Poland on 1 September |
| Atomic bombings | 1945 | Hiroshima on 6 August, Nagasaki on 9 August |
The Second World War, 1939 to 1945
The harshness of Versailles, the Great Depression that began in 1929, the rise of Fascism under Mussolini in Italy and of Nazism under Hitler, who became Chancellor of Germany in 1933, and the failure of the League of Nations to stop aggression in Manchuria, Abyssinia and the Rhineland led to a second and larger war. Britain and France accepted Hitler claims at Munich in 1938, and Germany signed a non-aggression pact with the Soviet Union in August 1939. Germany invaded Poland on 1 September 1939, and Britain and France declared war two days later. The Axis Powers were Germany, Italy and Japan. The Japanese attack on Pearl Harbor on 7 December 1941 brought the United States into the war, and Germany had already invaded the Soviet Union in June 1941. The Allied landings in Normandy on 6 June 1944, remembered as D-Day, opened the western front in Europe. Germany surrendered in May 1945, and after atomic bombs were dropped on Hiroshima on 6 August and Nagasaki on 9 August 1945, Japan announced its surrender on 15 August and signed it on 2 September 1945. The United Nations came into existence on 24 October 1945, and the war ended Europe ability to hold its empires, hastening the freedom of India and of Asia and Africa.
Exam Point of View
Papers ask this topic as single-fact questions: the year or date of an event, the author of a book, the leader of a revolution, the place of a treaty or the headquarters of the League of Nations. The frequent traps are the two revolutions of 1917, where the February Revolution actually took place in March and the October Revolution in November by the Western calendar; the two Paris treaties, one of 1783 ending the American war and one signed at Versailles in 1919; and the confusion between the immediate cause of the First World War at Sarajevo and the long-term causes of militarism and alliances. Candidates should also keep the order of 1939 to 1945 events clear: Poland, Pearl Harbor, D-Day, Hiroshima.
Important Facts
| Boston Tea Party | 1773 |
|---|---|
| American Declaration of Independence | 4 July 1776; drafted by Thomas Jefferson |
| Treaty that recognised American independence | Treaty of Paris, 1783 |
| Storming of the Bastille | 14 July 1789 |
| Motto of the French Revolution | Liberty, Equality, Fraternity |
| Author of The Social Contract | Jean-Jacques Rousseau |
| Steam engine improved by | James Watt, separate condenser patented in 1769 |
| October Revolution | 7 November 1917; Lenin and the Bolsheviks |
| Immediate cause of the First World War | Assassination of Archduke Franz Ferdinand at Sarajevo, 28 June 1914 |
| Treaty of Versailles | Signed 28 June 1919 |
| Headquarters of the League of Nations | Geneva, Switzerland |
| Second World War | 1 September 1939 to 1945; began with the invasion of Poland |
| Atomic bombings | Hiroshima 6 August 1945, Nagasaki 9 August 1945 |
| United Nations came into being | 24 October 1945 |
Practice MCQs on this topic
The storming of the Bastille, which marked the beginning of the French Revolution, took place on which date?
- A.4 July 1776
- B.14 July 1789
- C.26 August 1789
- D.21 January 1793
Show answer
On that day a Paris crowd attacked the Bastille, a royal fortress used as a prison, which stood for the arbitrary authority of the monarchy; the date is celebrated in France as the national day.
Read the full explanation →The book The Social Contract, which argued that sovereignty rests with the people, was written by whom?
- A.Montesquieu
- B.Voltaire
- C.Jean-Jacques Rousseau
- D.John Locke
Show answer
His book The Social Contract, published in 1762, argued that legitimate political authority comes from the general will of the people and not from the divine right of a king, and it became the intellectual charter of the French Revolution.
Read the full explanation →The American Declaration of Independence was adopted on 4 July 1776 and was drafted mainly by whom?
- A.George Washington
- B.Thomas Jefferson
- C.Benjamin Franklin
- D.Abraham Lincoln
Show answer
He was the principal author of the Declaration of Independence adopted by the Continental Congress on 4 July 1776, and he later became the third President of the United States.
Read the full explanation →Who among the following improved the steam engine and patented the separate condenser in 1769?
- A.James Hargreaves
- B.Richard Arkwright
- C.James Watt
- D.John Kay
Show answer
Watt added a separate condenser to the earlier Newcomen engine, patenting it in 1769, which made the steam engine efficient enough to drive factories, mines, railways and ships, and the unit of power is named after him.
Read the full explanation →The October Revolution of 1917 in Russia was led by which party and leader?
- A.The Mensheviks under Kerensky
- B.The Bolsheviks under Lenin
- C.The Social Revolutionaries under Trotsky
- D.The Cadets under Nicholas II
Show answer
In the October Revolution, which took place on 7 November 1917 by the Western calendar, the Bolshevik party led by Lenin overthrew the provisional government and took power in Petrograd, with Leon Trotsky organising the Red Guards.
Read the full explanation →The assassination of Archduke Franz Ferdinand, the immediate cause of the First World War, took place at which city?
- A.Vienna
- B.Sarajevo
- C.Belgrade
- D.Munich
Show answer
The heir to the Austro-Hungarian throne was shot at Sarajevo in Bosnia on 28 June 1914 by Gavrilo Princip, a Serbian nationalist, and Austria-Hungary declared war on Serbia a month later, after which the alliance system drew in the other powers.
Read the full explanation →The Treaty of Versailles, which formally ended the First World War with Germany, was signed in which year?
- A.1918
- B.1919
- C.1920
- D.1921
Show answer
The treaty was signed in the Hall of Mirrors at Versailles on 28 June 1919, five years to the day after the Sarajevo assassination.
Read the full explanation →The Second World War began in September 1939 with the German invasion of which country?
- A.Czechoslovakia
- B.France
- C.Poland
- D.The Soviet Union
Show answer
Germany invaded Poland on 1 September 1939, and Britain and France, which had guaranteed Polish independence, declared war on Germany two days later, turning the attack into a world war.
Read the full explanation →The first atomic bomb was dropped on Hiroshima on which date?
- A.6 August 1945
- B.9 August 1945
- C.15 August 1945
- D.2 September 1945
Show answer
The United States dropped an atomic bomb on the Japanese city of Hiroshima on that day, and the date is observed worldwide as Hiroshima Day.
Read the full explanation →Where was the headquarters of the League of Nations, established after the First World War?
- A.The Hague
- B.Geneva
- C.Paris
- D.New York
Show answer
The League of Nations, proposed in the Fourteen Points of President Woodrow Wilson and created under the Treaty of Versailles, began work in 1920 with its headquarters at Geneva in Switzerland; it failed to stop aggression in Manchuria, Abyssinia and Europe and was replaced by the United Nations in 1945.
Read the full explanation →Frequently Asked Questions
Why is 14 July a national day in France?
On 14 July 1789 a Paris crowd stormed the Bastille, a royal fortress and prison that stood for the arbitrary power of the monarchy. The day is remembered as the beginning of the French Revolution and is celebrated in France as Bastille Day.
Why are there two Russian revolutions in 1917?
Russia then used the Julian calendar. The February Revolution, which ended tsarist rule, happened in March by the Western calendar, and the October Revolution, in which the Bolsheviks took power, happened on 7 November. Examiners often give the Western date and the Russian name together.
What was the immediate cause of the First World War?
The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, at Sarajevo on 28 June 1914 by Gavrilo Princip. Austria-Hungary declared war on Serbia a month later and the alliance system drew in the other powers.
Which treaty ended the First World War with Germany?
The Treaty of Versailles, signed on 28 June 1919. It declared Germany guilty of starting the war, took away its colonies, limited its army and navy, demilitarised the Rhineland and imposed heavy reparations, which fed the resentment Hitler later used.
Where did the Industrial Revolution begin and why?
It began in Britain in the second half of the eighteenth century, because Britain had coal and iron, capital from trade, colonial markets for cloth, a supply of labour leaving the villages and a run of inventions in the textile industry and in steam power.
Sources
- India and the Contemporary World I (Class IX), Chapter 1: The French Revolution — NCERT
- India and the Contemporary World II (Class X), Chapter 1: The Rise of Nationalism in Europe — NCERT
- Themes in World History (Class XI), Chapters on the Industrial Revolution — NCERT





