Statistics for occurrence #1 of “Appomattox Rivers” in chapter 40 of Admiral David D. Porter, The Naval History of the Civil War.:

...outh and east of Richmond. On the 16th of May Beauregard attacked Butler's advanced position in front of Drury's Bluff, and Butler was forced back into his intrenchments between the James and the Appomattox Rivers ; thereupon Beauregard intrenched himself strongly in his front, covering the city of Richmond from any further attempts of Butler in that direction. This predicament of Butler gave rise to the cele...
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