Cold War, Decolonisation and Non-Aligned Movement Notes
World history notes on the Cold War and its flashpoints, decolonisation in Asia and Africa, Panchsheel, Bandung and the Non-Aligned Movement for exams.
By GK24 Editorial Team· Published · 4 min read

The years between the end of the Second World War in 1945 and the collapse of the Soviet Union in 1991 are called the Cold War. The two victors of the war, the United States and the Soviet Union, never fought each other directly, yet they divided the world into two armed camps, fought proxy wars in Asia, Africa and Latin America, and raced each other in arms and in space. The same decades saw the European empires break up as colony after colony in Asia and Africa became independent, and saw many of those new states refuse to join either camp. That refusal grew into the Non-Aligned Movement, in which India took the lead. Examiners draw from all three strands, usually as a single date, place or person.
How the Cold War began
The wartime alliance broke down over the fate of eastern Europe. Winston Churchill described the division in his speech at Fulton, Missouri, on 5 March 1946, where he said an iron curtain had descended across the continent. The American answer was containment, set out by the diplomat George Kennan and announced as the Truman Doctrine on 12 March 1947, which promised help to countries resisting communism. Economic aid followed in the Marshall Plan, the European Recovery Programme, from 1948; the Soviet bloc replied with Comecon in 1949. The first crisis came over Germany, where the Soviet Union blocked the land routes into West Berlin from June 1948 and the Western powers supplied the city by air for almost a year. Military blocs completed the division: the North Atlantic Treaty Organisation was signed at Washington on 4 April 1949, and the Soviet Union answered with the Warsaw Pact on 14 May 1955.
The flashpoints, decade by decade
| Event | Year | What to remember |
|---|---|---|
| Berlin Blockade and airlift | 1948-49 | First direct confrontation; Berlin supplied by air |
| Korean War | 1950-53 | Divided at the 38th parallel; armistice at Panmunjom |
| Hungarian uprising | 1956 | Crushed by Soviet tanks |
| Berlin Wall built | 1961 | Pulled down on 9 November 1989 |
| Cuban Missile Crisis | 1962 | Kennedy and Khrushchev; closest to nuclear war |
| Prague Spring | 1968 | Reform in Czechoslovakia ended by invasion |
| Soviet intervention in Afghanistan | 1979-89 | The last great proxy war |
| Dissolution of the Soviet Union | 1991 | End of the Cold War and of the bipolar order |
Between the crises came detente, a thaw marked by arms control: the Strategic Arms Limitation Talks produced SALT I in 1972 and SALT II in 1979. The thaw ended with Afghanistan and returned only under Mikhail Gorbachev, whose policies of glasnost and perestroika loosened the Soviet grip on eastern Europe.
Decolonisation in Asia and Africa
Independence came to Asia first. India and Pakistan became free in 1947, Burma and Ceylon in 1948, and Indonesia was recognised in 1949 after four years of fighting the Dutch. France lost Indochina after the defeat at Dien Bien Phu in 1954, settled at the Geneva Conference the same year. In Africa, Ghana under Kwame Nkrumah became in 1957 the first colony south of the Sahara to win independence; 1960 is remembered as the Year of Africa because seventeen countries became free in that single year, and in the same year the United Nations General Assembly adopted its declaration on granting independence to colonial countries and peoples. Algeria won independence from France in 1962 after a war begun in 1954, Kenya followed in 1963 under Jomo Kenyatta, Zimbabwe in 1980 and Namibia in 1990, the last mainland colony in Africa. The Suez Crisis of 1956, after Gamal Abdel Nasser nationalised the Suez Canal, showed that Britain and France could no longer act as imperial powers without American consent.
Panchsheel and the Non-Aligned Movement
Jawaharlal Nehru argued that newly free states should judge each issue on its merits rather than sign away their freedom to a bloc. The policy was given a moral code in the five principles of peaceful coexistence, Panchsheel, written into the agreement on trade with the Tibet region of China on 29 April 1954: mutual respect for sovereignty and territorial integrity, non-aggression, non-interference in internal affairs, equality and mutual benefit, and peaceful coexistence. The Asian-African Conference at Bandung in Indonesia in April 1955 brought twenty-nine countries together and spread the idea. After a meeting of Nehru, Josip Broz Tito and Nasser in 1956, the first summit of non-aligned countries met at Belgrade in September 1961 with twenty-five members; Nehru, Tito, Nasser, Sukarno of Indonesia and Nkrumah of Ghana are counted its founders. The term non-alignment is credited to V. K. Krishna Menon, who used it in a United Nations speech in 1953. Non-alignment meant neither neutrality nor passivity: the movement campaigned against colonialism, apartheid and nuclear weapons, and in 1964 its members formed the Group of 77 to press economic demands. India hosted the seventh summit at New Delhi in 1983, where Indira Gandhi took the chair.
Exam Point of View
Questions are almost always a date, a place or a person: the city of the Iron Curtain speech, the years of NATO and the Warsaw Pact, the year the Berlin Wall rose and fell, the venue of Bandung and of the first summit, the year of Panchsheel and who coined the word non-alignment. The standard traps are Bandung 1955 against Belgrade 1961, NATO 1949 against the Warsaw Pact 1955, and 1961 against 1989 for the Berlin Wall. UPSC prefers statement-based questions on the aims of non-alignment and on decolonisation in Africa; SSC and Railway papers keep to one fact.
Important Facts
| Cold War period | 1945 to 1991, between the United States and the Soviet Union |
|---|---|
| Iron Curtain speech | Winston Churchill, Fulton, Missouri, 5 March 1946 |
| Truman Doctrine | 12 March 1947; policy of containment framed by George Kennan |
| Marshall Plan | European Recovery Programme, from 1948; Soviet reply was Comecon, 1949 |
| NATO | Signed at Washington, 4 April 1949, by twelve countries |
| Warsaw Pact | Signed at Warsaw, 14 May 1955; dissolved in 1991 |
| Korean War | 1950 to 1953; division at the 38th parallel, armistice at Panmunjom |
| Cuban Missile Crisis | October 1962; Kennedy and Khrushchev |
| Panchsheel | 29 April 1954, India-China agreement on the Tibet region; Nehru and Zhou Enlai |
| Bandung Conference | April 1955, Indonesia; twenty-nine Asian and African countries |
| First NAM summit | Belgrade, September 1961; twenty-five member countries |
| Term 'non-alignment' | Credited to V. K. Krishna Menon, in a United Nations speech of 1953 |
| First free colony in sub-Saharan Africa | Ghana, 6 March 1957, under Kwame Nkrumah |
| Year of Africa | 1960; seventeen African countries became independent |
| Last colony on the African mainland | Namibia, independent in 1990 |
| NAM summit hosted by India | Seventh summit, New Delhi, 1983, chaired by Indira Gandhi |
Practice MCQs on this topic
In which American city did Winston Churchill deliver his famous 'Iron Curtain' speech in March 1946?
- A.Fulton, Missouri
- B.Washington, D.C.
- C.Boston, Massachusetts
- D.Chicago, Illinois
Show answer
Churchill, by then out of office, spoke at Westminster College in Fulton on 5 March 1946 and said that an iron curtain had descended across the continent from Stettin in the Baltic to Trieste in the Adriatic.
Read the full explanation →The North Atlantic Treaty Organisation (NATO) was founded in which year?
- A.1945
- B.1947
- C.1949
- D.1955
Show answer
The North Atlantic Treaty was signed at Washington on 4 April 1949 by twelve countries, during the Berlin blockade, and bound its members to treat an attack on one as an attack on all.
Read the full explanation →The Warsaw Pact, the military alliance of the Soviet bloc, was signed in 1955 in which city?
- A.Moscow
- B.Warsaw
- C.Prague
- D.Budapest
Show answer
The Treaty of Friendship, Co-operation and Mutual Assistance was signed in the Polish capital on 14 May 1955, which is why the alliance carries that city's name, although its forces were commanded from Moscow.
Read the full explanation →The Asian-African Conference of 1955, an important step towards non-alignment, was held at which place?
- A.Colombo
- B.Bandung
- C.Belgrade
- D.Cairo
Show answer
The Asian-African Conference met at Bandung in Indonesia in April 1955 with twenty-nine newly independent countries, condemned colonialism and racialism, and endorsed the principles of peaceful coexistence; it is often called the forerunner of the Non-Aligned Movement.
Read the full explanation →The first summit conference of the Non-Aligned Movement was held in 1961 at
- A.Cairo
- B.Jakarta
- C.Belgrade
- D.Lusaka
Show answer
The first summit of non-aligned countries met at Belgrade, then the capital of Yugoslavia, in September 1961, with twenty-five participating countries, and Jawaharlal Nehru, Josip Broz Tito, Gamal Abdel Nasser, Sukarno and Kwame Nkrumah are regarded as the movement's founders.
Read the full explanation →The five principles of peaceful coexistence, known as Panchsheel, were set out in an agreement signed between India and China in which year?
- A.1950
- B.1954
- C.1962
- D.1955
Show answer
The five principles were written into the preamble of the agreement on trade and intercourse between India and the Tibet region of China, signed on 29 April 1954 by Jawaharlal Nehru and Zhou Enlai.
Read the full explanation →The term 'non-alignment' is generally credited to which Indian leader, who used it in a speech at the United Nations in 1953?
- A.Jawaharlal Nehru
- B.V. K. Krishna Menon
- C.Sardar Vallabhbhai Patel
- D.Dr S. Radhakrishnan
Show answer
Krishna Menon, India's best known diplomat of the period and later Defence Minister, is credited with coining the expression non-alignment in a United Nations speech in 1953; he is also remembered for the longest speech ever made at the Security Council, on Kashmir.
Read the full explanation →Which was the first colony south of the Sahara in Africa to win independence, in 1957?
- A.Kenya
- B.Nigeria
- C.Ghana
- D.Tanganyika
Show answer
The Gold Coast became independent as Ghana on 6 March 1957 under Kwame Nkrumah, the first colony in sub-Saharan Africa to do so, and Nkrumah became a leading voice of pan-Africanism and a founder of the Non-Aligned Movement.
Read the full explanation →The Berlin Wall, which divided the city for twenty-eight years, was pulled down in which year?
- A.1961
- B.1989
- C.1990
- D.1991
Show answer
The wall was opened and began to be broken up on 9 November 1989, the single most memorable image of the end of the Cold War.
Read the full explanation →The Cuban Missile Crisis, the moment at which the Cold War came closest to a nuclear war, took place in
- A.1956
- B.1962
- C.1968
- D.1973
Show answer
In October 1962 American aerial photographs revealed Soviet missile sites under construction in Cuba; President John F. Kennedy ordered a naval quarantine of the island and, after thirteen days, Nikita Khrushchev agreed to withdraw the missiles, the United States undertaking not to invade Cuba.
Read the full explanation →Frequently Asked Questions
Why is it called the Cold War?
Because the United States and the Soviet Union never fought each other directly. The conflict was carried on through arms races, propaganda, economic aid, espionage, military blocs and proxy wars in Korea, Vietnam, Afghanistan and parts of Africa and Latin America, but the two superpowers themselves never met in open battle.
What are the five principles of Panchsheel?
Mutual respect for each other's sovereignty and territorial integrity, mutual non-aggression, non-interference in each other's internal affairs, equality and mutual benefit, and peaceful coexistence. They were written into the India-China agreement of 29 April 1954 and later endorsed at the Bandung Conference of 1955.
Who are regarded as the founders of the Non-Aligned Movement?
Jawaharlal Nehru of India, Josip Broz Tito of Yugoslavia, Gamal Abdel Nasser of Egypt, Sukarno of Indonesia and Kwame Nkrumah of Ghana. They led the first summit at Belgrade in September 1961, which twenty-five countries attended.
What is the difference between non-alignment and neutrality?
A neutral state stays out of disputes altogether. A non-aligned state keeps out of military blocs but takes an active position on world questions, judging each on its merits; the Non-Aligned Movement campaigned against colonialism, apartheid and nuclear weapons and pressed for a fairer economic order.
Which year is called the Year of Africa and why?
The year 1960, because seventeen African countries, most of them French colonies, became independent in that single year. In the same year the United Nations General Assembly adopted its declaration on granting independence to colonial countries and peoples.
Sources
- Themes in World History (Class XI), chapters on the modern world — NCERT
- Politics in India since Independence (Class XII), Chapter 1: The Cold War Era — NCERT
- Agreement on trade and intercourse between the Tibet region of China and India, 29 April 1954 — Ministry of External Affairs, Government of India





