Florence Nightingale pioneered the use of statistical graphics to visualize hospital mortality data during the Crimean War.
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The U.S. government established the Office of Strategic Services during World War II.
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The fall of the Berlin Wall occurred in 1989.
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The Zulu Kingdom rose to prominence in southern Africa in the 19th century.
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The NSA developed tools for cryptographic analysis during World War II.
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The GI Bill provided benefits to returning World War II veterans.
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The Crusades were a series of religious wars during the Middle Ages.
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The U.S. government conducted Operation Crossroads nuclear tests after World War II.
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