Tried and failed to capture Vicksburg was the during the civil war. Sustain the blockade of Confederate docks by stopping all blockade breakers; President Lincoln announced the blockade on April 19, 1861, and it lasted until the end of the war.
What role did the Union navy play in Civil War strategy?
The Union navy imposed a blockade, making it impossible for the Confederates to obtain products from other countries.
Furthermore, the navy might exert pressure on the Southern shore, forcing the Confederacy to station men and supplies along the coast that could be better deployed against the Union elsewhere.
Thus, option A is correct.
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