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| 1945 | Stalin, Joseph |  |
| 6th Nov Moscow The USSR announces that it will make its own atomic bomb |
| 1946 | Stalin, Joseph | |
| Dec Siberia Soviet scientists achieve their 1st nuclear chain reaction |
| 1948 | Sakharov, Andrei Dmitrievich | |
| Helps invent the Hydrogen Bomb |
| 1949 | Kurchatov, Igor | |
| Leads Russia succesful campaign to test its own atomic bomb |
| 1949 | Stalin, Joseph | |
| Russia successfully tests the atomic bomb |
| 1950 | Voroshilov, Klement | |
| 8th Mar Announces Russia possesses the atomic bomb |
| 1958 | Khruschev, Nikita Sergeyevich | |
| Moscow Announces a nuclear test ban for 1 year |
| 1959 | Khruschev, Nikita Sergeyevich | |
| Geneva Attends but a Treaty is not agreed due to USAopposition, the "big hole" theory |
| 1960 | Khruschev, Nikita Sergeyevich | |
| June Soviet Premier Nikita Khrushchev pledges support for "wars of national liberation" in an address to the United Nations |
| Dec The Joint Strategic Target Planning Staff complete SIOP 62, plans for the launch of more than 3,000 nuclear weapons, including hundreds of hydrogen bombs, to attack in the first few hours of conflict 1,000 targets in Communist countries |
| 1961 | Brezhnev, Leonoid Ilych | |
| 21st Mar Geneva During talks on test bans calls for a veto over inspections to verify compliance |
| 1961 | Khruschev, Nikita Sergeyevich | |
| 13th Aug East Germans begin building Berlin Wall, precipitating a crisis between Eastern and Western blocs. The Berlin Wall stands for some four decades as a symbol of East-West conflict |
| 28th Aug Moscow Ends the 3 year moratorium on nuclear tests |
| 20th Sep The United States and the Soviet Union sign a "Joint Statement of Agreed Principles for Disarmament Negotiations ," the McCloy-Zorin Accords |
| 30th Oct Novaya Zemlya A yield of around 50 megatons, the largest nuclear weapon ever detonated |
| 30th Oct Novaya Zemlya The Soviet hydrogen bomb Tsar Bomba is detonated over Novaya Zemlya Island, Arctic Sea |
| 30th Oct The Soviet Union explodes the most powerful bomb ever, a 58 megaton atmospheric nuclear weapons test over Novaya Zemlya off Northern Russia |
| 20th Dec Novaya Zemlya The United Nations General Assembly adopts the McCloy-Zorin Accords |
| 1970 | Brezhnev, Leonoid Ilych | |
| 5th Mar The Non-Proliferation Treaty enters into force |
| 12th April Bay of Biscay The Soviet nuclear submarine K-8 sinks in the Bay of Biscay, killing 53 crew members |
| 16th April Vienna The main rounds of Strategic Arms Limitation Talks (SALT) open in Vienna |
| 1971 | Brezhnev, Leonoid Ilych | |
| 11th Feb The Treaty on the Prohibition of the Emplacement of Nuclear Weapons and Other Weapons of Mass Destruction on the Seabed and the Ocean Floor and in the Subsoil Thereof is signed in Washington, Moscow and London |
| 30th Sep Agreement on Measures to Reduce the Risk of Outbreak of Nuclear War Between the U.S. and USSR is signed in Washington and enters into force |
| 1972 | Brezhnev, Leonoid Ilych | |
| May Moscow Signs a SALT agreement while Nixon is in Moscow |
| 26th May 1st round of Strategic Arms Limitation Talks (SALT I ) ends with President Nixon and General Secretary Brezhnev signing the Anti-Ballistic Missile (ABM) Treaty & the SALT Accord and the Interim Agreement on Strategic Offensive Arms |
| 3rd Oct The Anti-Ballistic Missile (ABM) Treaty enters into force |
| 1973 | Brezhnev, Leonoid Ilych | |
| 22nd June The Agreement between the United States and the Soviet Union on the Prevention of Nuclear War enters into force, the major policy objectives are "to remove the danger of nuclear war and the use of nuclear weapons" |
| 24th Oct Russia threatens a cease-fire without the USA, the USA issues a nuclear alert |
| 26th Oct The USA lifts it's nuclear alert |
| 1974 | Brezhnev, Leonoid Ilych | |
| 3rd July Moscow The Threshold Test Ban Treaty (TTBT) , the Treaty limits nuclear test explosion to under 150 kilotons (over ten times the yield of the Hiroshima bomb) |
| 3rd July The United States and the Soviet Union agree to the Protocol to the Anti-Ballistic Missile Agreement, which limits ABM deployment to a single area |
| 23rd Nov President Gerald Ford and General Secretary Leonid Brezhnev sign the Vladivostok Accord, which establishes a framework for future Strategic Arms Limitation Talks (SALT II) between the United States and the Soviet Union |
| 1981 | Brezhnev, Leonoid Ilych | |
| 17th July Semipalitinsk Russia performs nuclear tests at Eastern Kazakh/Semipalitinsk |
| 1985 | Chernenko, Konstantin Ustinovich | |
| 8th Jan Moscow Agrees with the USA to resume negotiations to reduce nuclear weapons |
| 31st Jan Moscow Sends a letter to the USAsaying Star Wars will escalate the arms race |
| 1985 | Gorbachev, Mikhail Sergeyevich | |
| 7th April Russia announces a unilateral freeze of medium-range nuclear missiles |
| 8th April Moscow Announces the suspension of the deployment of SS-20 missiles in Europe |
| 21st Nov Geneva Meets Reagan to discuss arms control |
| 21st Nov Geneva Russia & the USA agree not to "achieve military superiority" |
| 21st Nov Geneva Russia & the USA agree "nuclear war cannot be won" |
| 1986 | Gorbachev, Mikhail Sergeyevich | |
| 9th Jan Announces a 15 yr timetable for the abolition of all nuclear weapons |
| 26th April Chernobyl Reporting restrictions are restored, only Tass bulletins are published |
| 14th May Chernobyl Speaks on Russian TV because radiation levels can be measured in the west |
| 1987 | Gorbachev, Mikhail Sergeyevich | |
| 28th Feb Moscow Drops his insistence on the curtailment of the USASDI program |
| 28th Feb Moscow Proposes a separate agreement on abolition of medium range nuclear missiles in Europe |
| 14th April Moscow Proposes removing Russia's short range missiles from Eastern Europe |
| 1991 | Gorbachev, Mikhail Sergeyevich | |
| 29th July The USA& Russia agree to arms control after 9 years of negotiatons |
| 31st July Bush & Gorbachev sign the Strategic Arms Reduction |
| 6th Oct Announces nuclear cuts |
| 1992 | Yeltsin, Boris Nikolayevich | |
| 29th Jan President Bush and President Yeltsin cap the first day of their Washington summit by announcing their countries had agreed to slash their long-range nuclear arsenals by two-thirds |
| 29th Jan Yeltsin unveils an ambitious plan to cut nuclear weapons spending and said his republic's weapons would no longer be aimed at any USAtargets |
| 17th June President Bush and President Yeltsin sign a breakthrough arms-reduction agreement, addressing Congress , Yeltsin pledges to find any American prisoners of war still being held in Russia |
| 2000 | Putin, Vladimir Vladimirovich | |
| 4th June Clinton and Putin agree to each dispose 34 metric tons of weapons-grade nuclear plutonium and to establish a military center in Moscow for USAand Russian officers to share early warning data on missile and space launches |
| 16th June Putin proposes a Moscow-based early warning center for nuclear missile launches around the world |
| 18th July Jiang Zemin and Putin denounce the USAproposed missile defense program as a violation of the 1972 ABM treaty, they also vow to strengthen a strategic partnership between their countries |
