Statistics for occurrence #1 of “Port Hudson” in chapter 29 of Admiral David D. Porter, The Naval History of the Civil War.:

...o-operate with the Army the moment it should make its appearance in the rear of Vicksburg. Two iron-clads were left at the mouth of the Red River, blocking it up closely, which sealed the fate of Port Hudson . No more supplies would get to the Confederates from that quarter. One iron-clad was left at Carthage, three at Warrenton, (where the enemy aimed at building heavy works), and two or three in t...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Port Hudson (Louisiana, United States) 5,174 132 536 2 0 user votes
Port Hudson (Missouri, United States) 0 0 0 0 0 user votes

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