Everything you need to master Unit 8 — the Cold War between the US and USSR, decolonization across Africa and Asia, proxy wars, the Cuban Missile Crisis, China under Mao, and the collapse of European empires.
~15% of the AP exam
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Unit 8 covers the Cold War and decolonization era from 1945 to 1991 — the geopolitical rivalry between the US-led capitalist West and the Soviet-led communist East, the wave of decolonization that ended European empires and created dozens of new nations, the proxy wars in Korea, Vietnam, and elsewhere, and the eventual collapse of the Soviet Union.
The College Board wants you to understand how European maritime exploration connected the Americas to Afro-Eurasia for the first time, the Columbian Exchange that transformed biology and demography, the rise of the Atlantic slave trade as the economic engine of New World plantations, and how mercantilist policies and joint-stock companies built the first global economy.
Unit 8 makes up roughly 15% of the AP World History exam — one of the most heavily weighted units — and its events continue to shape the modern world from US–China rivalry to ongoing conflicts in former colonial territories.
Key terms preview
A taste of what you'll find in The Essentials and Flashcards.
Cold War
Geopolitical conflict (1947–91) between the US-led capitalist West and Soviet-led communist East — fought through proxy wars, not direct combat.
Truman Doctrine
1947 US policy of containing communism by supporting nations threatened by Soviet expansion — started the Cold War in earnest.
Decolonization
Process by which colonized peoples in Africa and Asia won independence from European powers, mostly between 1945 and 1975.
Non-Aligned Movement
Coalition of newly independent nations (India, Egypt, Yugoslavia) that refused to join either Cold War bloc.
Cuban Missile Crisis
1962 standoff over Soviet missiles in Cuba — the closest the Cold War came to nuclear war.
Apartheid
South Africa's system of institutionalized racial segregation (1948–94); dismantled under Nelson Mandela.
1. The Cold War reshaped global politics around a binary ideological conflict
After WWII, the world divided into US-led capitalism vs Soviet-led communism. Every conflict, revolution, and independence movement was filtered through this binary.
2. Decolonization transformed the global map but not always its power structures
Dozens of new nations emerged between 1945 and 1975, but Cold War superpowers intervened constantly, and former colonial economic structures often persisted as "neocolonialism."
3. Newly independent nations sought a "third way" beyond the Cold War binary
The Non-Aligned Movement, led by Nehru and Nasser, rejected the Cold War binary — though Cold War pressures made genuine non-alignment difficult.
4. The nuclear age fundamentally changed the logic of warfare
Mutually Assured Destruction (MAD) meant nuclear powers couldn't fight directly. Instead, they fought through proxy wars in Korea, Vietnam, Angola, and Afghanistan.