Statistics for occurrence #1 of “Pittsburg Landing” in chapter 17 of Admiral David D. Porter, The Naval History of the Civil War.:

...te a position they generally did so with an unaccountable haste. In this case they may have heard that an army was marching on them from the rear, or that Pope was returning with a great force from Pittsburg Landing . Whatever it was, something had a very demoralizing effect upon the garrison, and the guns of the fort were no longer well aimed or rapidly fired. On the night of June 4th, a great many explosi...
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Entity Corpus Doc Corpus Doc  
Pittsburg Landing (Tennessee, United States) 2,237 28 197 0 0 user votes

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