WWII Aftermath and the United Nations
AdvancedAftermath: Europe divided, the US and USSR emerged as superpowers, empires decolonised; the United Nations (1945) was founded to keep the peace — though Security Council vetoes kept great-power rivalry alive. Germany was partitioned; the Cold War was seeded.
- Germany split; Europe divided; two superpowers rise
- UN founded 1945; P5 vetoes
- Decolonisation wave + Cold War seeds
§Text Passage
1The political map of Europe was redrawn entirely: Germany was occupied in four zones by the United States, Britain, France and the Soviet Union, Poland's borders shifted west, and one country after another in Eastern Europe acquired pro-Soviet governments within Moscow's sphere. In 1946 Churchill described an 'iron curtain' descending across the continent, dividing Europe into two camps.
2The old European powers declined while two superpowers rose: Britain and France were drained, the United States towered over the world economy and held a temporary monopoly of the atomic bomb, and the Soviet Union fielded vast armies across Eastern Europe. The Europe-centred order was over, and a bipolar world would dominate the post-war decades.
3The United Nations formally came into being on 24 October 1945, pledging to 'save succeeding generations from the scourge of war'; the five permanent members of the Security Council each hold a veto — the UN can act collectively when the great powers agree, but is paralysed when they clash. The war's horrors also produced the Universal Declaration of Human Rights, bringing rights into the international order.
4At the same time decolonisation gathered pace: India became independent in 1947, and the countries of South-East Asia and Africa threw off colonial rule in succession as the old imperial order dissolved. Yet once the common enemy was gone, the ideological rivalry between the US and the USSR came into the open, with the Truman Doctrine and the Marshall Plan — wartime allies swiftly became adversaries, and the Cold War began.
1Summary 重點摘要
Aftermath: Europe divided, the US and USSR emerged as superpowers, empires decolonised; the United Nations (1945) was founded to keep the peace — though Security Council vetoes kept great-power rivalry alive. Germany was partitioned; the Cold War was seeded.
2Vocabulary cards Vocabulary
Founded 1945 to keep peace and foster cooperation.
The UN's core body — five permanent members hold vetoes.
The post-war US and USSR — the two poles.
The post-war wave of colonies gaining independence.
The divide between Soviet-held Eastern Europe and the West, named by Churchill.
Post-war Germany was administered in four zones by the US, Britain, France and the USSR; by 1949 this became two German states.
Germany's formal 1949 division — the Soviet zone became East Germany, the western zones West Germany — reunited only in 1990.
Each of the five permanent Security Council members can block a resolution — paralysing the UN when great powers disagree.
3Step by step Steps
- Map redrawnThe political map of Europe was redrawn entirely: Germany was occupied in four zones by the United States, Britain, France and the Soviet Union, with Berlin likewise divided; Poland's borders shifted west, and large German populations were transferred; one after another the countries of Eastern Europe acquired pro-Soviet governments and fell into Moscow's sphere. In 1946 Churchill described an 'iron curtain' descending across the continent, dividing Europe into two armed camps.
- Two superpowersThe old European powers declined while two superpowers rose: Western Europe lay in ruins, Britain and France were drained and their colonies demanded independence; the United States, untouched at home, towered over the world economy and held a temporary monopoly of the atomic bomb; the Soviet Union fielded vast armies across Eastern Europe. The Europe-centred world order was over — a bipolar structure led by Washington and Moscow would dominate the post-war decades.
- UN foundedThe United Nations formally came into being on 24 October 1945, pledging to 'save succeeding generations from the scourge of war', with a General Assembly, a Secretariat and a Security Council; the five permanent members (the US, UK, France, the USSR and China) each hold a veto. When the great powers agreed, the UN could act collectively for peace; when they clashed, the Council was paralysed — a flaw shown repeatedly during the Cold War — yet the UN's work in relief, trusteeship and international law remained profound.
- DecolonisationThe war had sapped the British, French and Dutch colonial empires while Asian self-determination surged: India became independent in 1947, Indonesia and Burma threw off colonial rule in turn, and through the 1950s and 1960s a wave of African independence swept the continent, giving birth to scores of new states. The old imperial order dissolved; the post-war world of sovereign nations saw the new countries gather into a 'Third World' force within the UN.
- Cold War seedsOnce the common enemy was gone, the ideological and territorial rivalry between the US and the USSR came into the open: in 1947 the Truman Doctrine pledged containment of communism and the Marshall Plan poured aid into rebuilding Western Europe; the Soviet Union, for its part, installed friendly regimes across Eastern Europe as a buffer zone. Divided Germany became the front line of confrontation and Berlin a standing crisis — world war had barely ended when the Cold War began.
- A divided EuropeIn a 1946 speech in America, Churchill described an 'iron curtain' stretching from Stettin on the Baltic to Trieste on the Adriatic: east of it, Poland, Hungary, Czechoslovakia and their neighbours built communist regimes one after another and joined the Soviet camp; Germany itself split into two states. Europe's division lasted more than four decades, until 1989 brought it to an end.
- The end of empiresWartime Japan had shattered European colonial armies, showing Asian peoples that the empires were not invincible; after the war Britain and France lacked the strength to hold vast colonies. India became independent in 1947 under partition, and the countries of South-East Asia and Africa threw off colonial rule in succession; the world's political map changed beyond recognition, and decolonisation became one of the great currents of the later twentieth century.
4Diagrams Diagrams
5Worked example Example
Why did the US–Soviet alliance crumble so fast?
- Ideology: capitalism vs communism
- Spheres: Eastern vs Western Europe
- Atomic bomb: US monopoly → Soviet crash programme
- Germany: partition planted the Berlin crises
- → Truman Doctrine 1947 opens the Cold War
- Answer: Because the wartime alliance rested only on the common enemy: once Germany and Japan fell, the ideological divide between capitalism and communism stood exposed; Eastern Europe sat in the Soviet sphere while Western Europe leaned on America; the US atomic monopoly spurred a Soviet crash programme; and occupied Germany planted the Berlin crises. The Truman Doctrine of 1947 opened the Cold War — allies fell out because the tensions predated the alliance, merely masked by the war.
6Common mistakes Mistakes
7Quick check Quick check
Q1When was the UN founded and who are the P5?
Q2How was Germany handled after WWII?
Q3What was decolonisation? Give one example.
Q4How many people died in the Second World War (estimate)?
Q5When was the United Nations founded, and how does it differ from the League of Nations?
8Recap Recap
- Germany split; Europe divided; two superpowers rise
- UN founded 1945; P5 vetoes
- Decolonisation wave + Cold War seeds
- The Iron Curtain divided Europe: Eastern Europe inside the Soviet sphere
- India led the way in 1947; the British, French and Dutch empires dissolved