Statistics for occurrence #1 of “Matamoras” in entry palo-alto-battle-of of Harper's Encyclopedia of United States History:

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On a part of a prairie in Texas, about 8 miles northeast of Matamoras , Mexico, flanked by ponds and beautified by tall trees (which gave it its name), General Taylor, marching with less than 2,300 men from Point Isabel towards Fort Brown, encountered about 6,000 Mexica...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Matamoras (Indiana, United States) 379 30 1 0 0 user votes
Matamoras (Pennsylvania, United States) 327 4 1 0 0 user votes
Matamoras (Ohio, United States) 178 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.