The

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naval blockade used
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to block
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ports and the Mississippi River to cut off shipment of goods and supplies.
The
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was more offensive, and the
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was more defensive, so there were more incursions into the
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than into the
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.

1 answer

The Union naval blockade used warships to block Southern ports and the Mississippi River to cut off shipment of goods and supplies. The Union strategy was more offensive, and the Confederate strategy was more defensive, so there were more incursions into the South than into the North.