Vladimir Lenin was a key figure in the Russian Revolution of 1917, leading the Bolshevik Party to power.

The Tian Shan mountain range is often referred to as the 'Roof of the World' due to its high peaks and extensive range.

The Green Revolution aimed to increase agricultural productivity, which was crucial for improving the socio-economic conditions of the rural poor.

The Brahmo Samaj, founded by Raja Ram Mohan Roy, focused on social reforms including women's rights and education.

The Bengal School of Art emerged in the late 19th century as a response to colonial influences, promoting traditional Indian themes and styles.

The Romantic Movement emerged as a response to the negative effects of the Industrial Revolution, emphasizing emotion, nature, and individualism in reaction to industrialization's mechanization.

The Kheda Satyagraha of 1918 was initiated by Mahatma Gandhi to address the grievances of farmers affected by crop failure and high taxes.

The Non-Cooperation Movement was initiated by Mahatma Gandhi in response to the Rowlatt Act, as a form of protest against repressive measures.

Lord Dalhousie introduced the Doctrine of Lapse, which allowed the British to annex any princely state if the ruler died without a male heir.

Chandragupta Maurya founded the Maurya Empire in 322 BCE, marking the beginning of a significant era in Indian history.

The Integrated Rural Development Programme was launched in the 1970s to provide employment and promote self-reliance among the rural poor.

The Amazon Rainforest is recognized as a biodiversity hotspot due to its vast array of plant and animal species, many of which are endemic to the region.

The Industrial Revolution, which began in the late 18th century, marked the transition to industrial capitalism, characterized by the growth of factories, mechanization, and urbanization.

The Brahmaputra River is often referred to as the 'Sorrow of Bengal' because of its tendency to flood, causing significant damage to the region.

The French Revolution introduced the concepts of citizenship and individual rights, challenging the traditional hierarchies and monarchies of the time.

The Mauryan Empire, established in 322 BCE, is significant for unifying most of the Indian subcontinent under a centralized administration, which laid the foundation for future empires.

The Vedic period saw a more fluid social structure where individuals could change their social status based on merit and achievements, unlike the later rigid caste system.

Jean-Jacques Rousseau's 'The Social Contract' is a foundational text of Enlightenment thought, discussing the relationship between individuals and the state.

The 'Arthashastra', written by Kautilya (Chanakya), is a key text on ancient Indian political theory and statecraft.

A key feature of the Harappan Civilization was its complex urban planning, including well-laid streets and advanced drainage systems.

The Industrial Revolution led to the rise of factory-based economies, transforming production and labor.

The Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the U.S., was a significant factor in the U.S. decision to enter World War I.

The Cripps Mission was largely rejected by Indian leaders, as it did not meet their demands for complete independence.

The major outcome of the Round Table Conferences was the Government of India Act 1935, which provided for a greater degree of self-governance.

World War II led to the emergence of the United States and the Soviet Union as superpowers, resulting in the Cold War, a period of geopolitical tension.

The Black Death resulted in the deaths of millions, leading to a significant decline in the population of Europe in the 14th century.

The Champaran Satyagraha of 1917 highlighted the plight of indigo farmers and was one of the first successful movements led by Gandhi.

The Champaran Satyagraha led to improvements in the conditions of indigo farmers, who were suffering from exploitative practices, thus addressing some aspects of rural poverty.

The First War of Independence in 1857 led to the establishment of direct British rule in India, known as the British Raj.

A significant outcome of the French Revolution was the end of the feudal system in France, leading to social and political changes across Europe.