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Period: to
Early American History
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Period: to
Great Depression
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Period: to
World War II
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United Nations formed
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Period: to
Early Cold War
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22nd Amendment
prohibits anyone who has
been elected president twice from being
elected again -
Truman Doctrine
U.S. policy that gave
military and economic aid to countries
threatened by communism -
Berlin Airlift
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Marshall Plan
a program to help
European countries rebuild after World War II -
NATO established
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Korean War
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Period: to
Civil Rights Era
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Rosenbergs trial
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First H-Bomb detonated by the United States
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Period: to
Vietnam War
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Jonas Salk invents the Polio Vaccine
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USSR launches Sputnik
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Period: to
End of the Cold War
-
Period: to
1990s-21st Century