Statistics for occurrence #1 of “United States” in entry cannon of Harper's Encyclopedia of United States History:

... the Washington navy-yard, 1890. Hotchkiss gun, English make, five barrels, revolving around a common axis, placed upon block weighing about 386 tons, fires thirty rounds a minute; adopted by the United States in 1891. Automatic rapid-firing gun, invented by John and Matthew Browning, of Ogden, Utah; firing 400 shots in one minute and forty-nine seconds; adopted by the United States in 1896. Zalins...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 16,340 0 0 0 user votes
United States (New Mexico, United States) 6 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.