Mobilization is the answer.
Congress had decided that once a slave traveled into a free state, they were free and they could never be enslaved again. But in the Dred Scott decision, they changed their mind and people no longer had to honor "once free, always free."
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Truman put limits on MacArthur because Truman was not happy that MacArthur moved to north of 38th parallel.
Also,<span>MacArthur rejected the idea of peace negotiations and he was very arrogant.
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They were primary gatherers of wild plant foods