Class 10 Social Science · Chapter 1

Samacheer Class 10 Social Science - Outbreak of World War I and Its Aftermath

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Chapter-wise textbook exercise answers for Outbreak of World War I and Its Aftermath with validation-aware solutions.

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Outbreak of World War I and its Aftermath — key concepts & quick answers

What were the main causes of the First World War?
The deeper causes were aggressive nationalism, imperialism, militarism and the system of secret alliances. The immediate cause was the assassination of Archduke Franz Ferdinand of Austria-Hungary at Sarajevo in June 1914.
When did the First World War take place?
The First World War was fought from 1914 to 1918.
Which were the two opposing groups in the First World War?
The Allied Powers (Britain, France, Russia, and later Italy and the USA) fought against the Central Powers (Germany, Austria-Hungary, the Ottoman Empire and Bulgaria).
What was the Treaty of Versailles?
It was the 1919 peace treaty that formally ended the First World War. It placed the blame for the war on Germany, forced it to pay heavy reparations, take territorial losses and reduce its army.
What was the League of Nations?
It was an international organisation set up in 1920 after the First World War to maintain world peace and settle disputes between nations, but it failed to prevent the Second World War.
Sections in this chapter
I Choose the correct answer 6III Choose the correct statement 1IV Match the following 1II Fill in the blanks 3V Answer briefly 6Exercise (Fill in the blanks - continued) 3II Fill in the blanks / mixed table 1VI Answer the following in detail 4VIII Map Work 1
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1I Choose the correct answer6 questions
Q.I.1What were the three major empires shattered by the end of First World War?v
  1. a. Germany, Austria Hungary, and the Ottomans
  2. b. Germany, Austria-Hungary, and Russia
  3. c. Spain, Portugal and Italy
  4. d. Germany, Austria-Hungary, Italy
Solution

By the end of World War I the great imperial polities that were destroyed included the Austro-Hungarian Empire, the Ottoman Empire and the Russian Empire; the German imperial structure also collapsed and was replaced by the Weimar Republic. The textbook's options do not exactly match the historically complete set; note this when answering from the given choices.

Answer:

By the end of the First World War, several of Europe's great multi-national empires had collapsed. The three major empires that were shattered were the Austro-Hungarian Empire, the Ottoman (Turkish) Empire, and the Russian Empire; the German Empire also fell. The Austro-Hungarian Empire broke up into separate nation-states such as Austria, Hungary, Czechoslovakia and Yugoslavia. The Ottoman Empire lost its Arab provinces and shrank to roughly modern Turkey. The Russian Empire collapsed in the Revolution of 1917, which gave rise to the Soviet Union. Their fall redrew the political map of Europe and West Asia and created many new independent countries.

Q.I.2Which country emerged as the strongest in East Asia towards the close of nineteenth century?v
  1. a. China
  2. b. Japan
  3. c. Korea
  4. d. Mongolia
Solution

Japan emerged as the strongest power in East Asia by the late 19th century after rapid modernization (Meiji Restoration) and victory in the Sino-Japanese War.

Answer:

b

Q.I.3Who said "imperialism is the highest stage of capitalism"?v
  1. a. Lenin
  2. b. Marx
  3. c. Sun Yat-sen
  4. d. Mao Tsetung
Solution

Vladimir Lenin wrote the pamphlet 'Imperialism, the Highest Stage of Capitalism' (1916).

Answer:

a

Q.I.4What is the Battle of Marne remembered for?v
  1. a. air warfare
  2. b. trench warfare
  3. c. submarine warfare
  4. d. ship warfare
Solution

The First Battle of the Marne (1914) stopped the German advance into France and led to the stalemate that produced extensive trench warfare on the Western Front.

Answer:

b

Q.I.5To which country did the first Secretary General of League of Nations belong?v
  1. a. Britain
  2. b. France
  3. c. Dutch
  4. d. USA
Solution

The first Secretary-General of the League of Nations was Sir Eric Drummond of Britain.

Answer:

a

Q.I.6Which country was expelled from the League of Nations for attacking Finland?v
  1. a. Germany
  2. b. Russia
  3. c. Italy
  4. d. France
Solution

The Soviet Union (referred to in the options as 'Russia') was expelled from the League of Nations in December 1939 after its attack on Finland (the Winter War).

Answer:

b

2III Choose the correct statement1 questions
Q.III.1i) The Turkish Empire contained many non-Turkish people in the Balkans. ii) Turkey fought on the side of the central powers iii) Turkey's attempt to attack Suez Canal but were repulsed. Choose the correct statement:v
  1. a. i) and ii) are correct
  2. b. i) and iii) are correct
  3. c. ii) and iii) are correct
  4. d. i), ii) and iii) are correct
Solution

All three statements are correct: the Ottoman (Turkish) Empire included many non-Turkish peoples in the Balkans; the Ottoman Empire joined the Central Powers; Ottoman attempts against the Suez Canal were repulsed by the Allies.

Answer:

d

Q.III-2Assertion (A): The first European attempts to carve out colonies in Africa resulted in bloody battles. Reason (R): There was stiff resistance from the native population. Choose the correct option: a) Both A and R are correct b) A is right but R is not the correct reason c) Both A and R are wrong d) R is right but A is wrongv
  1. a. Both A and R are correct
  2. b. A is right but R is not the correct reason
  3. c. Both A and R are wrong
  4. d. R is right but A is wrong
Solution

The early European attempts to establish colonies in Africa met stiff resistance from the native population, which led to bloody battles. Both the assertion and the reason are correct, and the reason correctly explains the assertion. Hence option (a).

Answer:

a

3IV Match the following1 questions
Q.IV.1Match the following: Column A - 1. Treaty of Brest-Litovsk; 2. Jingoism; 3. Kemal Pasha; 4. Emden; 5. Hall of Mirrors. Column B - A. Versailles; B. Turkey; C. Russia with Germany; D. England; E. Madras.v
  1. Column A
    1. 1. Treaty of Brest-Litovsk
    2. 2. Jingoism
    3. 3. Kemal Pasha
    4. 4. Emden
    5. 5. Hall of Mirrors
  2. Column B
    1. A. Versailles
    2. B. Turkey
    3. C. Russia with Germany
    4. D. England
    5. E. Madras
Solution

The correct matches are taken from the textbook exercise columns: Treaty of Brest-Litovsk pairs with Russia with Germany; Jingoism pairs with England; Kemal Pasha pairs with Turkey; Emden pairs with Madras; and Hall of Mirrors pairs with Versailles.

#Column AColumn B
1Treaty of Brest-LitovskRussia with Germany
2JingoismEngland
3Kemal PashaTurkey
4EmdenMadras
5Hall of MirrorsVersailles
4II Fill in the blanks3 questions
Q.II.11. Japan forced a war on China in the yearv
Solution

The First Sino-Japanese War began in 1894 when Japan forced war on Qing China; it ended with the Treaty of Shimonoseki (1895).

Answer:

Japan forced a war on China in the year 1894. This conflict is known as the First Sino-Japanese War, which lasted from 1894 to 1895. The war was primarily fought over influence and control of Korea, which was a tributary state of China's Qing Dynasty. Japan, having undergone rapid modernization and military reforms, sought to expand its imperial ambitions in East Asia. The Japanese military decisively defeated the Chinese forces, demonstrating its growing power and the weakness of the Qing Empire. The war concluded with the Treaty of Shimonoseki in 1895, which granted Japan significant territorial concessions, including Taiwan and the Liaodong Peninsula, and recognized Korea's independence, effectively placing it under Japanese influence. This event marked Japan's emergence as a major regional power.

Q.II.22. The new state of Albania was created according to the Treaty of signed in May 1913.v
Solution

After the Balkan Wars, the Treaty of London (May 1913) recognized an independent Albanian state and defined its borders.

Answer:

The new state of Albania was created according to the Treaty of London, signed in May 1913. This treaty brought an end to the First Balkan War, in which the Balkan League (Serbia, Bulgaria, Greece, and Montenegro) successfully fought against the Ottoman Empire. The creation of an independent Albania was largely a result of the intervention of the Great Powers, particularly Austria-Hungary and Italy. These powers feared that if Serbia gained a direct outlet to the Adriatic Sea by annexing Albanian territory, it would significantly increase Serbian influence and disrupt the delicate balance of power in the Balkans. Therefore, the establishment of Albania as a sovereign state was a strategic decision to contain Serbian expansion and manage the competing geopolitical interests in the region.

Q.II.33. Japan entered into an alliance with England in the yearv
Solution

The Anglo-Japanese Alliance was signed in 1902 between Britain and Japan.

Answer:

Japan entered into an alliance with England in the year 1902. This landmark agreement, known as the Anglo-Japanese Alliance, was a pivotal moment in international relations at the turn of the 20th century. For Britain, it was a strategic move to secure its interests in the Far East against the growing threat of Russian expansionism, allowing it to concentrate its naval power in European waters. For Japan, the alliance provided crucial diplomatic recognition and a powerful ally, which significantly bolstered its position against Russia and facilitated its imperial ambitions in Korea and Manchuria. The alliance played a key role in the lead-up to the Russo-Japanese War of 1904-1905, where Britain's diplomatic support indirectly aided Japan's victory.

5V Answer briefly6 questions
Q.V.1How do you assess the importance of Sino-Japanese War?v
Solution

Key points: showed effectiveness of Meiji reforms; weakened Qing rule; territorial and economic gains for Japan (Taiwan, indemnity); boosted Japanese prestige; changed regional power dynamics in East Asia.

Answer:

The First Sino-Japanese War (1894–95), fought mainly over influence in Korea, was highly significant. It marked Japan's emergence as a modern military and naval power and exposed the weakness and decline of Qing China. By the Treaty of Shimonoseki, China recognised the independence of Korea and ceded Taiwan and other territories to Japan, besides paying a large indemnity. The victory strengthened Japanese imperial ambitions in East Asia and encouraged further expansion, while accelerating the decay of imperial China. It also alarmed the Western powers and triggered a scramble for concessions in China, reshaping the balance of power in the region.

Q.V.2Name the countries in the Triple Entente.v
Solution

The Triple Entente was the agreement linking Britain, France and Russia before WWI; it later formed the core of the Allied Powers.

Answer:

The Triple Entente was an alliance formed before the First World War between three major powers: Great Britain, France and Russia. It grew out of a series of understandings — the Franco-Russian Alliance, the Anglo-French Entente Cordiale, and the Anglo-Russian Entente. The Triple Entente stood opposed to the Triple Alliance of Germany, Austria-Hungary and Italy. This division of Europe into two heavily armed and hostile camps was one of the major underlying causes of the First World War.

Q.V.3What were the three militant forms of nationalism in Europe?v
Solution

Militant nationalism in Europe took aggressive forms such as jingoism (belligerent nationalism), chauvinism (extreme patriotic bias), and pan-nationalist ideologies (like Pan-Germanism or Pan-Slavism) that sought territorial expansion or ethnic unification.

Answer:

The three militant forms of nationalism in Europe before the First World War were jingoism, chauvinism, and pan-nationalist movements such as Pan-Slavism and Pan-Germanism. Jingoism meant an aggressive, warlike patriotism that favoured the use of force; chauvinism meant an exaggerated and blind belief in the superiority of one's own nation; and pan-nationalism sought to unite all people of the same ethnic or linguistic group across existing borders. These intense and competitive nationalisms increased suspicion and rivalry among European nations and helped create the tense atmosphere that finally led to war.

Q.V.4What do you know of trench warfare?v
Solution

Define trenches, describe features (front-line, support, reserve trenches), explain causes of stalemate (firepower vs. mobility) and mention living conditions and tactical consequences.

Answer:

Trench warfare was the characteristic form of fighting on the Western Front during the First World War. Opposing armies dug long, deep trenches facing each other, separated by a dangerous strip of ground called 'no-man's land,' which was filled with barbed wire, mines and machine-gun fire. Soldiers lived for long periods in these trenches in miserable conditions, where cold, mud, disease and rats were common. Attacks across no-man's land caused enormous casualties for very little gain, so the fighting became a deadlocked stalemate for years. New weapons such as machine guns, poison gas and heavy artillery made trench warfare especially deadly.

Q.V.5What was the role of Mustafa Kemal Pasha?v
Solution

Summarise his military leadership in independence, political role in ending the Ottoman system, founding the republic, and implementing modernising secular reforms that transformed Turkish society.

Answer:

Mustafa Kemal Pasha, later honoured as Atatürk ('Father of the Turks'), was the founder of modern Turkey. After the defeat of the Ottoman Empire in the First World War, he led the Turkish War of Independence against the Allied plan to partition Ottoman lands. He abolished the Sultanate in 1922 and proclaimed the Republic of Turkey in 1923, becoming its first President. He then introduced sweeping modernising reforms — separating religion from the state, adopting the Latin alphabet, granting new rights to women, and westernising law, dress and education. His leadership transformed Turkey into a secular, modern nation-state, and he is remembered as one of the most influential national leaders of the twentieth century.

Q.V.6List out any two causes for the failure of the League of Nations.v
Solution

State each cause briefly and explain its effect: absence reduced authority; lack of enforcement made treaties and resolutions unenforceable against aggressors.

Answer:

Two important causes for the failure of the League of Nations were as follows. First, the absence of major powers weakened it from the start. The United States, whose President Woodrow Wilson had actually proposed the League, never joined because the American Senate refused; and powerful states such as Germany, Japan and Italy either withdrew or ignored it. Second, the League had no armed force of its own to enforce its decisions. It depended on member states to apply economic sanctions or supply troops, but they were often unwilling to act. As a result, it could not stop the aggression of Japan, Italy and Germany during the 1930s.

6Exercise (Fill in the blanks - continued)3 questions
Q.55. In the battle of Tannenberg suffered heavy losses.v
Solution

At the Battle of Tannenberg (1914) the Russian army suffered heavy losses against the German forces.

Answer:

In the Battle of Tannenberg, which occurred in August 1914 during the initial stages of World War I, Russia suffered heavy losses. This battle was a decisive victory for the German Eighth Army against the Russian Second Army on the Eastern Front. The German forces, led by Generals Paul von Hindenburg and Erich Ludendorff, executed a brilliant encirclement maneuver, virtually annihilating the Russian Second Army. The battle resulted in immense casualties for the Russians, with tens of thousands killed or wounded and over 90,000 taken prisoner. This catastrophic defeat severely crippled Russia's early war efforts, significantly weakened its military capacity, and had a profound psychological impact, contributing to the long-term challenges faced by the Russian Empire during the war.

Q.66. as Prime Minister represented France in Paris Peace Conference.v
Solution

French Prime Minister Georges Clemenceau represented France at the Paris Peace Conference (1919).

Answer:

Georges Clemenceau, as Prime Minister, represented France in the Paris Peace Conference in 1919. Known for his unyielding resolve and often referred to as 'The Tiger,' Clemenceau played a dominant role in shaping the post-World War I treaties, most notably the Treaty of Versailles. His primary objective during the conference was to ensure France's security and to impose severe punitive measures on Germany, which he believed was essential to prevent future German aggression. Clemenceau's firm stance on reparations, territorial adjustments, and military restrictions on Germany reflected the deep desire for retribution and security felt by the French people, who had endured immense suffering and destruction during the war. His influence was instrumental in the harsh terms imposed on Germany.

Q.77. Locarno Treaty was signed in the yearv
Solution

The Locarno Treaties were signed in 1925, aiming to secure post–World War I territorial settlements in Western Europe.

Answer:

The Locarno Treaty was signed in 1925, specifically on October 16th, in Locarno, Switzerland, and formally signed in London on December 1st. This series of agreements was crucial for post-World War I European security. It guaranteed the borders of France, Germany, and Belgium, which were established by the Treaty of Versailles, and included mutual guarantees of peace. The treaty aimed to normalize relations between Germany and its former adversaries, particularly France, and was seen as a significant step towards lasting peace in Europe, earning its architects the Nobel Peace Prize. It marked a period of optimism and cooperation, often referred to as the "spirit of Locarno."

7II Fill in the blanks / mixed table1 questions
Q.II.match(Visible pairs / entries as printed) 2. Jingoism - Turkey 3. Kemal Pasha - Russia with Germany 4. Emden - England 5. Hall of Mirrors - Madras (The table/text appears garbled in source.)v
Solution

The OCR mixed columns. Using the chapter glossary and context: 'jingoism' is defined in the glossary as 'blind patriotism' (chauvinism). Mustafa Kemal Pasha was the leader of modern Turkey. Emden refers to the German cruiser SMS Emden. The Hall of Mirrors is the famous gallery in the Palace of Versailles (site of the Treaty of Versailles).

Answer:

The corrected matches for the given terms are as follows: Jingoism refers to extreme nationalism characterized by aggressive foreign policy and an eagerness for war, often expressed as blind patriotism or chauvinism. Kemal Pasha, whose full name was Mustafa Kemal Atatürk, was a Turkish field marshal, revolutionary statesman, and author who served as the first President of Turkey from 1923 until his death in 1938. He was the founder of the Republic of Turkey and is renowned for his extensive reforms. Emden refers to the SMS Emden, a light cruiser of the German Imperial Navy that achieved fame for its daring raids on Allied shipping in the Indian Ocean during the early months of World War I. The Hall of Mirrors is a magnificent gallery located in the Palace of Versailles, near Paris, France. It is famous as the site where the Treaty of Versailles was signed on June 28, 1919, officially ending World War I between the Allied powers and Germany.

8VI Answer the following in detail4 questions
Q.VI.1Discuss the main causes of the First World War.v
Solution

Explain each cause briefly with its role: militarism (preparedness and mobilization plans), alliances (obligation to support allies), imperial rivalry (colonial conflicts and prestige), nationalism (irredentism and ethnic tensions), Balkan unrest, and the assassination as the trigger that sparked mobilizations and declarations of war.

Answer:

Main causes of World War I:
- Militarism: Arms race (especially naval) and glorification of military power increased readiness for war.
- Alliances: Complex alliance systems (Triple Entente and Triple Alliance) turned regional conflicts into wider war.
- Imperialism: Competition for colonies and global dominance created tensions among great powers.
- Nationalism: Aggressive national pride and ethnic/nationalist movements (particularly in the Balkans) destabilized Europe.
- Balkan crises: The decline of the Ottoman Empire and the Balkan Wars created flashpoints and rival claims.
- Assassination of Archduke Franz Ferdinand (28 June 1914): The immediate trigger that led Austria-Hungary to confront Serbia and activated alliance commitments.
Together these long-term tensions and the immediate catalyst produced a rapid escalation into a general European war.

Q.VI.2Highlight the provisions of the Treaty of Versailles relating to Germany.v
Solution

List the Treaty clauses specifically affecting Germany: Article 231 (guilt), reparations obligations, territorial adjustments in Europe and overseas, military limitations and demilitarised zones, prohibition of union with Austria, and placement of colonies under League mandates. These terms aimed to weaken Germany politically, militarily and economically.

Answer:

Major provisions: (1) War guilt clause (Article 231) — Germany accepted responsibility; (2) Reparations — heavy payments to Allies; (3) Territorial losses — Alsace-Lorraine to France, Eupen-Malmedy to Belgium, Northern Schleswig to Denmark, West Prussia and Posen to Poland (corridor to Baltic), Saar placed under League control, loss of colonies as League mandates, demilitarisation of the Rhineland; (4) Military restrictions — army limited (100,000 men), no conscription, no tanks, no heavy artillery, no military aircraft, no submarines; navy severely limited; (5) Political restrictions — Anschluss with Austria forbidden; (6) League of Nations — Germany initially excluded and held responsible for war.

Q.VI.3Explain the course of the Russian Revolution under the leadership of Lenin.v
Solution

Outline chronological events from the February Revolution to Bolshevik seizure of power, key policies enacted by Lenin (peace, land, nationalisation), consequences (civil war, treaty with Germany), and later economic adjustment (NEP) leading to consolidation of Bolshevik rule and creation of the USSR.

Answer:

Key stages: (1) Background — 1917 February Revolution toppled the Tsar and set up a Provisional Government; (2) Lenin’s return (April 1917) and the April Theses — called for "All power to the Soviets", immediate peace, land to peasants; (3) Growing Bolshevik influence — Soviet support, strikes, and soldiers’ unrest; (4) October/November 1917 Bolshevik (October) Revolution — seizure of Petrograd, overthrow of Provisional Government; (5) Bolshevik decrees — Decree on Peace, Decree on Land, nationalisation of banks and industries; (6) Treaty of Brest-Litovsk (1918) — Russia exited WWI, ceding territory to Germany; (7) Civil War (1918–1921) — Reds (Bolsheviks) defeated Whites and foreign interventions; policies: War Communism during the war, Red Terror; (8) NEP (New Economic Policy) from 1921 — partial market reforms to revive economy; (9) Consolidation — Bolshevik control solidified and USSR formed (1922).

Q.VI.4Estimate the work done by the League of Nations.v
Solution

Balance accomplishments (humanitarian, legal, dispute arbitration, mandates oversight, health and labour initiatives) against limitations (no enforcement, unanimity requirement, key absences, inability to check aggression by revisionist powers), concluding that the League had meaningful peacetime/administrative impact but failed as a collective security guarantor.

Answer:

The League achieved notable successes in humanitarian and technical work (refugee assistance, health campaigns, the Slavery Commission, the International Labour Organisation cooperation, and mandate supervision) and settled several minor disputes peacefully (e.g., Åland Islands, disputes between Finland and Sweden, and between Greece and Bulgaria). However, it failed to prevent major aggressions (Manchuria 1931, Abyssinia 1935), lacked an armed force and effective sanctions, and was weakened by the absence or withdrawal of major powers (notably the USA, Germany and Japan later). Overall, it had important humanitarian and dispute-resolution successes but strategic and enforcement failures undermined its role in preventing major wars.

9VIII Map Work1 questions
Q.VIII.1Mark the following countries on the world map: 1. Great Britain 2. Germany 3. France 4. Italy 5. Morocco 6. Turkey 7. Serbia 8. Bosnia 9. Greece 10. Austria-Hungary 11. Bulgaria 12. Rumaniav
Solution

On a world/Europe map, mark and label each country in its geographical location (Central/Western Europe for France, Germany, Austria-Hungary; Balkans for Serbia, Bosnia, Bulgaria, Greece, Romania; North Africa for Morocco; British Isles for Great Britain; Italy as the Mediterranean peninsula; Turkey straddling SE Europe and W Asia).

Answer:

Label on map: 1. Great Britain – islands northwest Europe (UK). 2. Germany – central Europe. 3. France – west of Germany. 4. Italy – southern Europe, peninsula. 5. Morocco – northwest Africa. 6. Turkey – Anatolia/partly in SE Europe and W Asia. 7. Serbia – central Balkans. 8. Bosnia – western Balkans (Bosnia & Herzegovina). 9. Greece – southern Balkans. 10. Austria-Hungary – historic area covering modern Austria, Hungary and parts of CEE/Balkans. 11. Bulgaria – eastern Balkans. 12. Rumania (Romania) – northeast Balkans/SE Europe.