Statistics for occurrence #1 of “U. S. A.” in entry newton-john of Harper's Encyclopedia of United States History:

...e was commissioned a brigadier-general of volunteers, Sept. 23, 1861, and was promoted major-general, March 30, 1863. For distinguished services in the battle of Gettysburg he was brevetted colonel U. S. A. , and later brigadier-general. During the war he also took part in the engagements at West Point, Gaines's Mill, and Glendale; in the forcing of Crampton's Gap, in the battles of Antietam, and the s...
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