History of Nuclear Weapons (ICAN Timeline)
Source: ICAN — International Campaign to Abolish Nuclear Weapons, published 2019-08-22
Summary
A comprehensive visual timeline of nuclear weapons history from the Manhattan Project (1942) through North Korea’s 2006 test, produced by the Nobel Peace Prize-winning disarmament organization ICAN.
Key Timeline Entries
| Date | Event |
|---|---|
| Aug 1942 | manhattan-project established in the US |
| Jul 16, 1945 | Trinity test — first nuclear explosion (15–20 kt) near Socorro, New Mexico |
| Aug 6, 1945 | Hiroshima — US uranium bomb kills 140,000+ |
| Aug 9, 1945 | Nagasaki — US plutonium bomb kills ~74,000 by end of 1945 |
| Jan 24, 1946 | UN General Assembly’s first resolution calls for complete elimination of nuclear weapons |
| Aug 29, 1949 | USSR tests “First Lightning” at Semipalatinsk, Kazakhstan |
| Oct 3, 1952 | UK tests at Montebello Islands, Western Australia |
| Nov 1, 1952 | US tests first hydrogen bomb (Enewetak Atoll) — 500× more powerful than Nagasaki |
| Mar 1, 1954 | US tests Castle Bravo — 17-megaton H-bomb at Bikini Atoll; contaminates Japanese fishing boat |
| Jul 9, 1955 | Russell-Einstein Manifesto: scientists warn of nuclear war dangers |
| Feb 17, 1958 | Campaign for Nuclear Disarmament (UK) holds first meeting |
| Dec 1, 1959 | Antarctic Treaty bans nuclear explosions in Antarctica |
| Feb 13, 1960 | France tests first nuclear bomb in Sahara (60–70 kt) |
| Oct 30, 1961 | USSR explodes Tsar Bomba — 58-megaton device, largest ever tested |
| Oct 16–29, 1962 | cuban-missile-crisis: 13-day standoff brings US and USSR to the brink |
| Aug 5, 1963 | Partial Test Ban Treaty: bans atmospheric, outer space, and underwater tests |
| Oct 16, 1964 | China tests first atomic bomb at Lop Nor |
| Feb 14, 1967 | Treaty of Tlatelolco: Latin America and Caribbean declared nuclear-free |
| Jul 1, 1968 | nuclear-non-proliferation-treaty opens for signature |
| May 18, 1974 | India’s “Smiling Buddha” test at Pokhran |
| Sep 22, 1979 | Possible South Africa/Israel joint nuclear test over Indian Ocean |
| Jun 12, 1982 | 1 million people rally in NYC Central Park for nuclear freeze — largest anti-war demo in history |
| Jul 10, 1985 | Rainbow Warrior (Greenpeace) sunk by French agents in New Zealand |
| Aug 6, 1985 | South Pacific Nuclear-Free Zone Treaty (Rarotonga) |
| Dec 10, 1985 | International Physicians for Prevention of Nuclear War wins Nobel Peace Prize |
| Sep 30, 1986 | Mordechai Vanunu reveals Israel’s nuclear program; Israel estimated to have up to 200 weapons |
| Oct 11–12, 1986 | Reagan–Gorbachev Reykjavik summit: first serious discussion of nuclear abolition |
| Dec 8, 1987 | INF Treaty: US and USSR eliminate all land-based intermediate-range missiles (300–3,400 mi) |
| Jul 10, 1991 | South Africa joins NPT; claims to have built and dismantled six weapons |
| Dec 15, 1995 | Southeast Asia Nuclear-Weapon-Free Zone |
| Apr 11, 1996 | Treaty of Pelindaba: 43 African nations create nuclear-free zone |
| Jun 1, 1996 | Ukraine gives last Soviet warhead to Russia — joins Belarus and Kazakhstan as post-Soviet denuclearized states |
| Jul 8, 1996 | ICJ advisory opinion: nuclear weapons generally contrary to international law |
| Sep 24, 1996 | CTBT opens for signature; India refuses |
| Nov 27, 1996 | Belarus completes transfer of nuclear missiles to Russia |
| May 1998 | India and Pakistan both conduct nuclear tests |
| Oct 9, 2006 | North Korea conducts first nuclear test |
Key Takeaways
- Scale of destruction: The Tsar Bomba (58 Mt) was 58,000Ă— more powerful than the Hiroshima bomb. The Castle Bravo test contaminated Pacific islanders and sparked global anti-nuclear activism.
- Two tracks from Day 1: The UN General Assembly’s very first resolution called for nuclear elimination — disarmament impulses are as old as the weapons themselves.
- Disarmament momentum: The 1982 NYC rally (1 million people), the Reykjavik summit, and the INF Treaty showed how close the world came to radical disarmament in the 1980s — before it stalled.
- South Africa’s unique case: The only country to independently build nuclear weapons and then voluntarily dismantle them.
- Post-Soviet denuclearization: Ukraine, Belarus, and Kazakhstan all relinquished inherited Soviet weapons — a rare proliferation-reversal success.
Wikilinks
manhattan-project · nuclear-non-proliferation-treaty · nuclear-arms-race · cuban-missile-crisis · nuclear-deterrence · nuclear-free-zones · prisoners-dilemma