Statistics for occurrence #1 of “Mississippi River” in chapter 7 of General Joseph E. Johnston, Narrative of Military Operations During the Civil War:

...e works.... I have decided to hold Vicksburg as long as possible, with the firm hope that the Government may yet be able to assist me in keeping this obstruction to the enemy's free navigation of the Mississippi River . I still conceive it to be the most important point in the Confederacy. Such an estimate of the military value of Vicksburg, expressed five or six weeks earlier, might not have seemed unreaso...
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