| 1918 | |
| 1922 | |
| 1939 | |
| 1941 | | 30 Oct:
FDR approves $1 billion in Lend-Lease aid for the USSR.USState JVL |
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| 1945 | |
| |
| | 24 Oct:
The United Nations is established.UN USState |
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| |
| 1953 | | 19 Jun:
Julius and Ethel Rosenberg are executed after being convicted of conspiracy to commit espionage.SI JWA |
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| 1954 | | 15 Feb:
The governments of Canada and the U. S. agree to jointly build a line of radar stations in defense against a possible air Soviet attack, the DEW (Distant Early Warning) line.1370th T&G |
|
| | 27 Jun:
The world's first nuclear power plant goes online.W I R E D PT |
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| 1957 | | 4 Oct:
The Soviet Union successfully launches the world's first artificial satellite, Sputnik I.NASA |
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| | 3 Nov:
Laika the dog becomes the first animal launched into orbit.Space NASA |
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| 1959 | | 14 Sep:
The Soviet space probe, Luna 2, becomes the first man-made object to reach another celestial body, crashing onto the Moon.W I R E D NASA |
|
| | 7 Oct:
The first photographs of the far side of the Moon are taken by Luna 3.NASA |
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| 1961 | | 12 Apr:
Yuri Gagarin becomes the first human in space.NASA Space |
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| 1962 | |
| | 15 Oct:
The Cuban Missile Crisis; CIA analysts, using photographs taken by a U2 spy plane, discover Soviet missile bases under construction in Cuba.AA GWU |
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| 1963 | | 16 Jun:
Russian cosmonaut Valentina Tereshkova is launched aboard Vostok 6 becoming the first woman to fly in space.NASA Space |
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| |
| | 30 Aug:
The hotline established between the United States and Soviet Union goes live.VOA SIMag |
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| 1966 | |
| 1970 | | 15 Dec:
Venera 7 lands on Venus and becomes the first spacecraft to transmit data from the surface of any extraterrestrial planet.RPW NASA |
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| 1975 | | 17 Jul:
The Apollo and Soyuz space modules link up in space.NASA SN |
|
| 1980 | |
| 1985 | | 19 Nov:
Mikail Gorbachov and Ronald Reagan meet for the first time.POLITICO USState |
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| 1986 | | 26 Apr:
An explosion and fire release large quantities of radioactive contamination into the atmosphere at the Chernobyl Nuclear Power Plant in Ukraine.NRC LS |
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| 1991 | |
USSR
