Statistics for occurrence #1 of “Mississippi River” in chapter 1.25, page 346 of Jefferson Davis, The Rise and Fall of the Confederate Government:

...e Confederacy. He then announces his decision to hold Vicksburg as long as possible, and expresses the hope that he may be assisted in keeping this obstruction to the enemy's free navigation of the Mississippi River . He closes his letter thus: I still conceive it to be the most important point in the Confederacy. While the council of war was assembled, the guns of the enemy opened on the works, and ...
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