21. Economic Development of the World: 1929 - 34

•    The Great Depression was a severe worldwide economic depression in the decade preceding World War II.
•    The timing of the Great Depression varied across nations, but in most countries it started in 1930 and lasted until the late 1930s or middle 1940s.
•    It was the longest, most widespread, and deepest depression of the 20th century.

20. Turkish Revolution: 1923

•    Turkey was called ‘Sickman of Europe’.
•    The disintegration of Ottoman Empire started in 19th Century and completed after Turkey’s defeat in the first world war.
•    The allies wanted to established their domination over Turkey itself and to give away parts of Turkey to Greece and Italy.

19. Chinese Revolution 1911 and 1949

•    The Chinese Revolution of 1911 is known as Republic Revolution.
•    The Chinese Revolution of 1949 in known as Communist Revolution.
•    In October of 1911, a group of revolutionaries in southern China led a successful revolt against the Qing Dynasty, establishing in its place the Republic of China and ending the imperial system.
•    The First President resigned from power in 1912, in favor of strongman Yuan Shaij-Kai 1912-16.

18. Russian Revolution

•    The Russian Revolution is the collective term for a series of revolutions in Russia in 1917, which dismantled the Tsarist autocracy and led to the creation of the Russian SFSR.
•    The Emperor was forced to abdicate and the old regime was replaced by a provisional government during the first revolution of February 1917 (March in the Gregorian calendar; the older Julian calendar was in use in Russia at the time).

17. First World War: August 4, 1914 to November 11, 1918

Causes: The events of July and early August 1914 are a classic case of "one thing led to another" - otherwise known as the treaty alliance system.
Mutual Defense Alliances- Over time, countries throughout Europe made mutual defense agreements that would pull them into battle. Thus, if one country was attacked, allied countries were bound to defend them.

16. Unification of Germany

• The unification of Germany into a politically integrated nation state officially occurred on 18 January 1871 at the Versailles Palace's Hall of Mirrors in France.
• Like Italy, Germany was also divided into many states. At the end of Napoleonic Wars 1792-1815 there were 38 independent states in Germany.
• In 1815, the German states along with the Austria were organized into a Germanic confederation.
• Prussia was one of the most powerful states.

15. Unification of Italy: 1848-70

The Italian Unification or Italian Risorgimento is known as the chain of political and military events that produced a united Italian peninsula under the Kingdom of Italy in 1861. These events can be broken down in five stages: