Important Dates in History 1898 The Trinity test marked the first detonation of a nuclear device. The test was overseen by theoretical physicist J. Robert Oppenheimer. The NAACP was founded by W.E.B. Du Bois and Ida B. Wells, among several others, in an effort to advance justice for African Americans in the United States. Albert Nelson Marquis established Marquis Who’s Who in 1898. 1909 1945
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