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The La Vérendrye brothers are the first European explorers in South Dakota.
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The Lewis + Clark expedition travels through South Dakota on its way to the Pacific Ocean.
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Lakota and other Great Plains nations sign a treaty promising peaceful relations.
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The U.S government creates the Dakota territory.
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George Custer leads a military expedition that finds gold in the Black Hills.
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South Dakota becomes the 40th state
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U.S troops kill about 350 Lakotas at the Wounded Knee Massecre.
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The Homestake Gold Mine closes operations.
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An underground research facility moves into the old Homestake Gold Mine.
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The Cattleman's blizzard kills thousands of livestock.
