Nuclear Weapons Crises
1947 8 Start of Korean War (Ceasefire agreement signed July 27, 1953). August Peace Festival cancelled due to the war.
1955 8 First World Congress against A- and H-bombs.
1963 8 US, UK, and USSR sign Partial Nuclear Test Ban Treaty (PTBT)
1967 2 Treaty for the Prohibition of Nuclear Weapons in Latin American signed (Treaty of Tlatelolco) .
12 Prime Minister Sato announces three non-nuclear principles: no possession, no production, no introduction.
1970 3 Nuclear Non-Proliferation Treaty (NPT) goes into effect.
1971 11 Three non-nuclear principles adopted by resolution in the Lower House of the Diet.
1975 4 End of the Vietnam War.
1982 6 Hiroshima Mayor Araki announces the Program to Promote the Solidarity of Cities toward the Total Abolition of Nuclear Weapons at the 2nd UN Special Session on Disarmament.
1985 8 South Pacific Nuclear-Free Zone Treaty (Rarotonga Treaty) signed.
1987 12 US and USSR sign the IMF treaty to abolish intermediate and short range missiles (in effect the following June 1) .
1989 12 End of Cold War announced at the US-USSR Summit on the Mediterranean island of Malta.
1991 1 Start of Persian Gulf War (Formally halted on April 11) .
7 US and USSR sign first Strategic Arms Reduction Treaty (START I)
10 USSR halts nuclear testing.

12 USSR dissolves into Russia and other nations.

1992 10 US and UK halt nuclear testing.
1993 1 US and Russia sign second Strategic Arms Reduction Treaty (START II) .

1995 5 NPT extended indefinitely.
12 Southeast Asian Nuclear-Free Zone Treaty signed.
1996 1 France halts nuclear testing.
1 US Senate ratifies START II.
4 African Nuclear-Free Zone Treaty (Perindaba Treaty) signed.
7 International Court of Justice (ICJ) issued an advisory opinion requested by UN General Assembly that finds the use of nuclear weapons to be "generally contrary to the rules of international law".

7 China conducts its 45th nuclear test, then declares a moratorium on nuclear testing.

9 Adoption of the CTBT (Comprehensive Nuclear Test Ban Treaty) by the 50th UN General Assembly.
1998 6 A New Agenda Coalition of 8 non-nuclear states presents a joint declaration, Toward a Nuclear-Weapon-Free World: The Need for a New Agenda.
1999 3 The North Atlantic Treaty Organization (NATO) begins bombing Yugoslavia (in June, President Milosovich accepts a peace proposal and the bombing is terminated) .
8 The Tokyo Forum for Nuclear Non-Proliferation and Disarmament established by the Japanese government (sponsored by the Hiroshima Peace Institute and the Japan Institute of International Affairs) announce their report, Facing Nuclear Dangers: An Action Plan for the 21st Century.
10 US Senate refuses to ratify the CTBT.
2000 4 Russian Dumas ratifies START II.
5 An "unequivocal undertaking" to eliminate nuclear arsenals is adopted by the NPT Review Conference.
6 North-South Summit Meeting on the Korean Peninsula.
6 Russia ratifies the CTBT.
2001 9 Terrorist attack in the US: 4 hijacked planes crashed into the World Trade Towers and the Pentagon; over 3000 people killed.
10 For the stated purpose of destroying the terrorist organization thought responsible for the attack in the US, the US and UK begin bombing Afghanistan where the leader of that organization was thought to be.
11 The US opposes a resolution presented by Japan to the UN General Assembly to abolish nuclear weapons, refuses to attend the CTBT promotion conference, and seeks to kill the CTBT.
11 The presidents of the US and Russia agree to reduce their strategic nuclear weapons by two thirds to about 2,000 warheads each.
12 President Bush notifies the Russian government of that the US intends to unilaterally abrogate the Anti-Ballistic Missile (ABM) Treaty.
2002 3 U.S. Secretary of State has stated that the U.S. is reconsidering its nuclear policy. He has said that the "nuclear non-use declaration" made to the non-nuclear weapon state signatories of the NPT is out of date.