The Cold War — forty-four years on the edge

The Cold War was not a single war but a forty-four-year condition of armed peace. The United States and the Soviet Union — wartime allies — turned on each other almost the moment Germany surrendered. They never fought each other directly. They came close. They armed proxies on every continent, financed coups, built ~70,000 nuclear warheads between them at the 1986 peak, and sponsored two parallel economic systems claiming to be the future. When it ended, history seemed for a moment to have ended too. It hadn't.

Origins — from alliance to antagonism, 1945-47

The wartime "Big Three" — Roosevelt, Churchill and Stalin — papered over deep ideological differences at Tehran (Nov 1943), Yalta (Feb 1945) and Potsdam (Jul-Aug 1945). By Potsdam, Roosevelt was dead, Churchill had been voted out mid-conference, and Truman was new. The compromises about post-war Europe began to unravel almost immediately.

• 5 March 1946 — Churchill's "Iron Curtain" speech at Westminster College, Fulton, Missouri, warned of Soviet expansion.
• Kennan's Long Telegram (Feb 1946) & "X Article" (Foreign Affairs, July 1947) articulated the strategy of containment.
• Truman Doctrine, 12 March 1947 — US would "support free peoples" resisting communism; immediate cause was Greece and Turkey.
• Marshall Plan, 5 June 1947 — Secretary of State George Marshall offered $13 billion (≈$160 billion today) in aid to reconstruct Europe. USSR refused for itself and Eastern Europe.
• Comecon (1949) & Cominform (1947) — Soviet economic and political response.

Two armed camps

The Berlin Blockade (June 1948 - May 1949) was the first major test. Stalin cut all land access to West Berlin; the Western Allies kept the city alive with the Berlin Airlift — 277,569 flights delivering 2.3 million tons of supplies. Stalin lifted the blockade. Within weeks, the Federal Republic of Germany (FRG, May 1949) and German Democratic Republic (GDR, October 1949) were proclaimed.

Flashpoints & proxy wars

Cuban Missile Crisis — thirteen days in October 1962

The closest the world has ever come to nuclear war. Cuba's communist revolution under Fidel Castro (Jan 1959) and the failed Bay of Pigs invasion (April 1961) pushed Havana into Moscow's arms. To deter further US attacks — and to balance US Jupiter missiles in Turkey — Khrushchev secretly deployed medium- and intermediate-range nuclear missiles to Cuba.

• 14 October 1962 — U-2 photographs reveal Soviet missile sites under construction.
• 22 October — JFK announces naval "quarantine" (legal nicety; a blockade would be an act of war).
• 24-27 October — Soviet ships turn around; Khrushchev's tense letters; a U-2 is shot down over Cuba; Soviet sub commander Vasili Arkhipov single-handedly refuses to authorise nuclear torpedo launch.
• 28 October — Khrushchev announces missile withdrawal in exchange for US no-invasion pledge and secret removal of Jupiter missiles from Turkey.

Aftermath. The 1963 Moscow-Washington hotline; the Partial Test Ban Treaty (5 Aug 1963) banning above-ground tests; momentum toward arms control that would produce the Non-Proliferation Treaty (1 Jul 1968) and SALT/START agreements.

Détente — relaxation, 1969-1979

By the late 1960s both superpowers were exhausted — the US by Vietnam, the USSR by the Sino-Soviet split (1956-89). Strategic parity in nuclear weapons made arms control rational. Détente — a French word for relaxation — produced a decade of negotiated stability.

• SALT I (1972) — Strategic Arms Limitation Treaty; capped ICBMs and SLBMs.
• ABM Treaty (1972) — limited missile defence; preserved MAD logic.
• Helsinki Accords (1 Aug 1975) — 35 nations accepted post-war borders; in return, USSR committed to human rights provisions that would empower dissidents.
• Nixon's visit to China (Feb 1972) — triangular diplomacy; eased pressure on US.
• SALT II (1979) — signed but never ratified after Soviet invasion of Afghanistan.

Second Cold War — 1979 to 1985

Détente collapsed with the Soviet invasion of Afghanistan (24 Dec 1979). US President Jimmy Carter responded with the Carter Doctrine, the 1980 Moscow Olympics boycott and CIA funding of the Afghan Mujahideen. Ronald Reagan's 1981 inauguration brought a sharp ideological turn — "evil empire" rhetoric, the largest peacetime military build-up in US history, and the Strategic Defense Initiative (SDI / "Star Wars", March 1983) — a missile-defence proposal that the cash-strapped USSR could not afford to match.

The mid-1980s were also the most dangerous nuclear false-alarm window — the September 1983 KAL-007 shootdown, Stanislav Petrov's decision to ignore a Soviet early-warning false positive on 26 September 1983, and the NATO Able Archer exercise of November 1983 that Soviet intelligence misread as preparations for a first strike.

The fall — Gorbachev, the wall, and the dissolution

Mikhail Gorbachev became General Secretary in March 1985. His reforms — Perestroika (restructuring of the economy) and Glasnost (openness) — were meant to save the system. They wrecked it.

• 1987 INF Treaty — eliminated an entire class of nuclear weapons (intermediate-range).
• April 1989 — Polish Round Table; Solidarity legalised.
• Summer 1989 — Hungary opens its border with Austria; East Germans pour through.
• 9 November 1989 — Fall of the Berlin Wall.
• By December 1989 — Velvet Revolution (Czechoslovakia), Romanian Revolution (Ceaușescu executed 25 Dec), Bulgaria, GDR all collapsed.
• 3 October 1990 — German reunification.
• August 1991 — Failed hard-liner coup in Moscow; Yeltsin atop a tank.
• 8 December 1991 — Belovezha Accords; Russia, Ukraine, Belarus declare USSR dissolved.
• 25-26 December 1991 — Gorbachev resigns; Soviet flag lowered over the Kremlin for the last time.

The Non-Aligned Movement & the Global South

Outside the bipolar order, a third bloc emerged. The Bandung Conference in Indonesia (18-24 April 1955) brought 29 Asian and African states together. The five principles — Panchsheel — had been articulated in the Sino-Indian agreement of 28 April 1954: mutual respect for sovereignty, non-aggression, non-interference, equality and peaceful coexistence.

NAM was not neutrality but autonomy — the right of newly independent states to take positions on each issue based on national interest, rather than bloc loyalty. It championed decolonisation, disarmament (the Six-Nation Five-Continent Initiative, 1984), apartheid abolition, and the New International Economic Order (NIEO, 1974) — a UN General Assembly resolution demanding fairer commodity prices, technology transfer and debt relief. Critics argued NAM often tilted toward the Soviet bloc; defenders pointed to its principled stands on apartheid South Africa, Palestine, and Vietnam.

India & the Cold War

Nehru's India tried to be a moral conscience in a bipolar world. New Delhi refused membership in SEATO (1954) and CENTO (1955), criticised the Soviet crackdown in Hungary 1956 but also US imperialism in Vietnam, condemned apartheid, mediated the Korean POW dispute (1953), and led peacekeeping operations (Sinai, Congo).

Three events bent India's foreign policy toward Moscow:

• 1962 Sino-Indian War — Soviet support was tepid; the US offered emergency arms but tied them to Kashmir concessions.
• 1965 Indo-Pak War — Tashkent Declaration (Jan 1966) mediated by Soviet Premier Kosygin; Lal Bahadur Shastri died there.
• 1971 Bangladesh Liberation War — US "tilt" to Pakistan; the Seventh Fleet's USS Enterprise sent into Bay of Bengal; USSR vetoed three UN Security Council resolutions and signed the Indo-Soviet Treaty of Peace, Friendship and Cooperation (9 Aug 1971) — a 20-year virtual alliance.

Economic cooperation deepened: rouble-rupee trade, Soviet aid for Bhilai (1959), Bokaro (1964), Vishakhapatnam steel plants and HAL fighter production. By 1991 the USSR was India's largest trading partner. The Soviet collapse coincided exactly with India's Balance of Payments crisis (1991), forcing both LPG reforms and a strategic pivot — first Look East (1991), then Look West (Iran, Israel), then the 2005 Indo-US civil nuclear deal, and today's "multi-vector" diplomacy of strategic autonomy.

Legacy — a world without a settled order

The Cold War's end produced the "unipolar moment" — a decade or so of unchallenged American primacy. NATO expanded eastward; the EU enlarged; China opened further. But the moment ended: the 2008 financial crisis, China's rise, Russia's return under Putin (Crimea 2014, Ukraine 2022), the US withdrawal from Afghanistan (2021), and a renewed great-power competition with semiconductors, AI and space as the new strategic commons.

For UPSC, the Cold War explains how today's world was made: the United Nations system, the IMF/World Bank/WTO, the nuclear non-proliferation regime, decolonisation, the founding architectures of the EU and ASEAN, and India's enduring foreign-policy autonomy.

Related deep-dives