Statistics for occurrence #1 of “Pittsburg” in chapter 12.47 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

... Pittsburg
G. T. Beauregard, General, C. S. A. On the 22d of January, 1862, Colonel Roger A. Pryor, a member of the Military Committe...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Pittsburg (Alabama, United States) 4 0 0 0 0 user votes
Pittsburg (Texas, United States) 1 0 1 0 0 user votes
Pittsburg (Colorado, United States) 0 0 0 0 0 user votes
Pittsburg (Florida, United States) 0 0 0 0 0 user votes
Pittsburg (Illinois, United States) 0 0 0 0 0 user votes
Pittsburg (Illinois, United States) 0 0 0 0 0 user votes
Pittsburg (Indiana, United States) 0 0 0 0 0 user votes
Pittsburg (Iowa, United States) 0 0 0 0 0 user votes
Pittsburg (Kentucky, United States) 0 0 0 0 0 user votes
Pittsburg (Michigan, United States) 0 0 0 0 0 user votes
Pittsburg (Missouri, United States) 0 0 0 0 0 user votes
Pittsburg (New Hampshire, United States) 0 0 0 0 0 user votes
Pittsburg (New Mexico, United States) 0 0 0 0 0 user votes
Pittsburg (New Mexico, United States) 0 0 0 0 0 user votes
Pittsburg (North Carolina, United States) 0 0 0 0 0 user votes
Pittsburg (Oklahoma, United States) 0 0 0 0 0 user votes
Pittsburg (Oklahoma, United States) 0 0 0 0 0 user votes
Pittsburg (Oregon, United States) 0 0 0 0 0 user votes
Pittsburg (South Carolina, United States) 0 0 0 0 0 user votes
Pittsburg (Utah, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.