Statistics for occurrence #1 of “Martinsburg” in chapter 28, page 480 of Maj. Jed. Hotchkiss, Confederate Military History, a library of Confederate States Military History: Volume 3, Virginia:

...'s Ferry. Part of the cavalry advanced from Winchester, by way of the Back Creek valley, to North Mountain depot, of the Baltimore & Ohio railroad, cut off the retreat of a body of the enemy at Martinsburg , and protected the flank of the army moving in that direction; while another portion led the advance to Leetown, where it encountered the enemy's cavalry, and after a severe engagement drove it throu...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Martinsburg (West Virginia, United States) 3,548 110 134 0 0 user votes
Martinsburg (Maryland, United States) 21 0 3 0 0 user votes
Martinsburg (New York, United States) 6 0 2 0 0 user votes
Martinsburg (Illinois, United States) 4 0 0 0 0 user votes
Martinsburg (Missouri, United States) 4 0 0 0 0 user votes
Martinsburg (Missouri, United States) 2 0 2 0 0 user votes
Martinsburg (Pennsylvania, United States) 1 0 1 0 0 user votes
Martinsburg (Indiana, United States) 0 0 0 0 0 user votes
Martinsburg (Iowa, United States) 0 0 0 0 0 user votes
Martinsburg (Kentucky, United States) 0 0 0 0 0 user votes
Martinsburg (Kentucky, United States) 0 0 0 0 0 user votes
Martinsburg (Nebraska, United States) 0 0 0 0 0 user votes
Martinsburg (Ohio, United States) 0 0 0 0 0 user votes
Martinsburg (Ohio, United States) 0 0 0 0 0 user votes
Martinsburg (Ohio, United States) 0 0 0 0 0 user votes
Martinsburg (Pennsylvania, 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.