Unit 8 Mid-Unit Study Guide Cold War & Decolonization (c. 1945–1975)

🔑 BIG IDEA

After World War II, global power shifted from European empires to two superpowers—the United States and the Soviet Union—whose ideological rivalry created the Cold War and shaped global politics through alliances, nuclear competition, and proxy wars. At the same time, decolonization led to the creation of dozens of new independent states, which faced challenges such as political instability, economic development, and conflicts caused by colonial borders. While some movements used nonviolent resistance to achieve change, others turned to violence, and Cold War tensions often influenced these struggles. By the late 20th century, internal weaknesses and reform efforts led to the collapse of the Soviet Union, ending the Cold War and reshaping the global balance of power.

🌍 8.1 – The World After World War II

After World War II, global power shifted away from European empires and toward two superpowers: the United States and the Soviet Union. Their rivalry created the Cold War, a global conflict between capitalism and communism. At the same time, decolonization movements created dozens of new independent nations, many of which tried to avoid choosing sides in the Cold War.

World War II weakened the traditional imperial powers of Europe. Countries such as Britain and France struggled economically and faced increasing resistance from nationalist movements in their colonies. As empires declined, new independent states emerged across Asia and Africa. Meanwhile, the United States and the Soviet Union became the dominant global powers, creating a bipolar world system.

Key Ideas, People, and Events

• Decolonization – The process in which colonies gained independence from European empires after World War II.

• Self-Determination – The idea that people should have the right to govern themselves without foreign control.

• United States – Emerged from WWII with a powerful economy and strong global influence.

• Soviet Union – Expanded its power by controlling Eastern Europe and promoting communism.

• India (1947) – One of the most important early examples of independence after WWII.

• Ghana (1957) – First sub-Saharan African colony to gain independence from European rule.

8.2 – Cold War Ideological Rivalry

The Cold War was a global struggle between two competing political and economic systems. The United States promoted capitalism and democracy, while the Soviet Union promoted communism and centralized economic control. Many newly independent nations did not want to align with either side and instead tried to remain neutral.

Key Ideas, People, and Events

• Cold War – Political and ideological rivalry between the United States and the Soviet Union from about 1947 to 1991.

• Capitalism – Economic system based on private ownership and free markets.

• Communism – Economic and political system where the state controls production and property is owned collectively.

• Non-Aligned Movement (NAM) – Group of countries that tried to remain independent from both Cold War superpowers.

• Bandung Conference (1955) – Meeting of Asian and African nations that promoted cooperation and non-alignment.

• Jawaharlal Nehru – Leader of India who supported non-alignment.

• Gamal Abdel Nasser – Egyptian leader who promoted Arab nationalism and independence from superpower influence.

8.3 – Effects of the Cold War

Although the United States and the Soviet Union rarely fought directly, their rivalry reshaped global politics. The Cold War produced military alliances, nuclear weapons competition, and proxy wars around the world.

Key Ideas, People, and Events

• NATO (1949) – Western military alliance led by the United States.

• Warsaw Pact (1955) – Communist military alliance led by the Soviet Union.

• Nuclear Arms Race – Competition between superpowers to build larger nuclear arsenals.

• Mutually Assured Destruction (MAD) – The idea that nuclear war would destroy both sides completely.

• Proxy Wars – Conflicts in which superpowers supported opposing sides without directly fighting each other.

• Korean War (1950–1953) – Early Cold War proxy war between communist North Korea and capitalist South Korea.

8.4 – Spread of Communism

Communism spread in several regions during the mid-20th century, often through revolutions and promises of land reform. These movements were especially powerful in countries where peasants faced severe inequality.

Key Ideas, People, and Events

• Chinese Communist Revolution (1949) – Mao Zedong and the Chinese Communist Party defeated the Nationalists and created the People’s Republic of China.

• Long March (1934–1935) – CCP retreat that strengthened Mao’s leadership and built support among peasants.

• Great Leap Forward (1958–1962) – Mao’s attempt to rapidly industrialize China through communes; resulted in a famine that killed 15–45 million people.

• Ho Chi Minh – Communist leader of Vietnam who fought for independence from France.

• Battle of Dien Bien Phu (1954) – Vietnamese communist victory that ended French colonial rule in Vietnam.

• Cuban Revolution (1959) – Fidel Castro established a socialist government and redistributed land.

8.5 – Decolonization After 1900

Decolonization accelerated after World War II as weakened European powers could no longer maintain control over their colonies. Nationalist movements—often led by educated elites—mobilized populations to demand independence. These movements took different forms, including nonviolent resistance, political negotiation, and armed conflict.

In many cases, independence created new challenges. Colonial borders often ignored ethnic and religious divisions, leading to conflict after independence. Additionally, Cold War tensions sometimes influenced independence movements and outcomes.

Key Ideas, People, and Events

Nationalism – The belief that people with a shared identity should govern themselves.

Indian National Congress (INC) – Organization that led India’s independence movement.

Muslim League – Political group that pushed for the creation of Pakistan.

Partition of India (1947) – Division of India into India and Pakistan; caused mass migration and violence (14 million displaced, over 1 million dead).

Mahatma Gandhi – Leader who used nonviolent resistance (civil disobedience) against British rule.

Salt March (1930) – Protest against British salt taxes that demonstrated the power of nonviolence.

Kwame Nkrumah – Leader who led Ghana (Gold Coast) to independence in 1957.

Gamal Abdel Nasser – Egyptian leader who promoted nationalism and nationalized the Suez Canal.

Suez Crisis (1956) – Conflict showing decline of European imperial power.

Algerian War of Independence (1954–1962) – Violent struggle against French rule.

8.6 – Newly Independent States

After independence, new nations faced major challenges. Many inherited borders that ignored ethnic and cultural differences, leading to conflict. Governments often played a strong role in guiding economic development, using policies like nationalization and state planning.

Newly independent states also remained connected to former colonial powers through migration, trade, and cultural ties.

Key Ideas, People, and Events

Redrawn Political Boundaries – Borders created by colonial powers that often caused conflict.

Biafra (Nigeria Civil War) – Attempted secession (1967–1970) that led to mass death and famine.

Creation of Israel (1948) – New state formed in former British Palestine, leading to conflict with neighboring Arab states.

State-Led Development – Governments directing economic growth through planning and control.

Nationalization – Government takeover of industries.

Indira Gandhi (India) – Expanded government control of the economy.

Julius Nyerere (Tanzania) – Promoted Ujamaa (African socialism and collective farming).

Sirimavo Bandaranaike (Sri Lanka) – Implemented socialist reforms and nationalization.

Migration to Imperial Metropoles – Movement of people from former colonies to Europe (e.g., South Asians to Britain, Algerians to France).

8.7 – Global Resistance and Conflict

During the 20th century, people responded to conflict and oppression in different ways. Some used nonviolent resistance, while others used violence or terrorism. Governments also used repression to maintain control.

Nonviolent movements proved effective in achieving political change, while violent approaches often led to prolonged conflict and instability.

Key Ideas, People, and Events

Nonviolent Resistance – Peaceful protest to achieve political change.

Satyagraha – Gandhi’s philosophy of nonviolent resistance.

Martin Luther King Jr. – Civil rights leader who used nonviolence to fight segregation in the U.S.

Civil Rights Movement – Movement to end racial discrimination in the United States.

Nelson Mandela – Leader who helped end apartheid in South Africa.

Apartheid – System of racial segregation in South Africa.

African National Congress (ANC) – Organization that opposed apartheid.

Military Dictatorships – Governments that used force to control populations (Chile under Pinochet, Uganda under Idi Amin).

Shining Path (Peru) – Maoist group that used violence against civilians.

Al-Qaeda – Terrorist organization that used global attacks to promote its ideology.

Military-Industrial Complex – Relationship between governments and arms industries that encourages military spending.

8.8 – End of the Cold War

By the late 20th century, the Cold War ended due to a combination of economic weakness, political reform, and public dissatisfaction within the Soviet Union. The United States also gained an advantage through military and technological developments.

The collapse of the Soviet Union in 1991 marked the end of the Cold War and the emergence of the United States as the dominant global power.

Key Ideas, People, and Events

Glasnost – Policy allowing openness and criticism in the Soviet Union.

Perestroika – Economic restructuring to improve the Soviet economy.

Mikhail Gorbachev – Soviet leader who introduced reforms but unintentionally weakened the system.

Economic Weakness – Inefficiency and stagnation in communist economies.

Soviet-Afghan War (1979–1989) – Costly conflict that drained Soviet resources.

Fall of the Berlin Wall (1989) – Symbolized the collapse of communist control in Eastern Europe.

Collapse of the Soviet Union (1991) – End of the USSR into 15 independent states.

End of Bipolar World – Shift from two superpowers to U.S. dominance.

🧠 What You Should Be Able to Explain

For your test and the AP exam, make sure you can explain:

• How World War II led to the rise of the United States and the Soviet Union as superpowers

• How ideological differences between capitalism and communism caused the Cold War

• How the Cold War shaped global politics through alliances, nuclear weapons, and proxy wars

• How and why decolonization occurred after World War II

• The different methods used to gain independence, including nonviolent resistance and armed struggle

• How nationalism contributed to independence movements and new nation-states

• The major challenges faced by newly independent states after independence

• How governments used state-led economic policies to promote development

• How migration and global connections continued after decolonization

• The different ways people responded to oppression and conflict

• How the Cold War influenced conflicts in Africa, Asia, and Latin America

• Why the Soviet Union weakened in the late 20th century

• How and why the Cold War ended

• How the end of the Cold War reshaped global power and international relations