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they had to surrender their rifles,
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they were allowed to keep horses if they had them,
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and in essence they were simply told
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go home.
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Nobody,
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except technically Lee himself, was taken into custody.
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But Lee's custody was simply the right
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to ride his horse back to richmond, if he chose,
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or wherever he wanted to go,
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and he was technically put under house arrest
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not allowed to leave his house for some period of time
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but never charged with anything.