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william clark was the youngest son of John Clark III and Ann Rogers
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meriwether lewis was the only son of Lucy and William Lewis
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In 1785 and 1798, John and Mary Lewis were born.
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Clark was enlisted in the u.s. army and became Lewis' commander.
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Lewis was enlisted in the us army under Clark's command.
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Lewis was invited by thomas jefferson to lead the famous expedition to the western u.s.
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the louisiana purchase cost $15 million (3 cents per acre)
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lewis was murdered just three years after becoming louisianas governor
