as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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generate a timeline for the us in the 20th century.
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1901 - theodore roosevelt becomes the 26th president of the united states.
1914 - world war i begins.
1920 - women are given the right to vote.
1929 - the great depression begins.
1941 - the us enters world war ii.
1945 - the us drops the atomic bombs on hiroshima and nagasaki.
1948 - the us president signs the marshall plan, initiating the reconstruction of europe.
1954 - the us supreme court issues its historic brown v. board of education ruling, overturning racial segregation in public schools.
1963 - president kennedy is assassinated.
1964 - president johnson signs the civil rights act ending discrimination based on race.
1969 - neil armstrong becomes the first person to walk on the moon.
1979 - the soviet union invades afghanistan.
1980 - the us and china establish diplomatic relations.
1989 - the berlin wall is torn down. 
1991 - the us leads a military coalition to successfully drive iraq out of kuwait during the gulf war.
1994 - the north american free trade agreement is signed.
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