Statistics for occurrence #1 of “Mississippi River” in chapter 25 of Alfred Roman, The military operations of General Beauregard in the war between the states, 1861 to 1865:

...orts on the Southern coast. Of the cities, St. Louis and Louisville were lost in 1861; Nashville, in February, 1862; New Orleans, in April; Galveston, in May; Memphis, in June. Besides these, the Mississippi River was lost, and also the three States of Missouri, Kentucky, and Tennessee, whose young men, generally, were with the Confederacy in feeling, and—if they had had encouragement and timely assistan...
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