Statistics for occurrence #1 of “U. S.” in chapter 4, page 248 of Thomas Wentworth Higginson, Massachusetts in the Army and Navy during the war of 1861-1865, vol. 2:

...t. 7, 1864. First Lieutenant, Adjutant, Dec. 17, 1864. Captain, 5th Mass. Cavalry, June 17, 1865. Mustered out, Oct. 31, 1865. First Lieutenant, 43d Infantry, M. V. M., in service of the U. S. , Sept. 20, 1862. Mustered out, July 30, 1863. Second Lieutenant, 29th Mass. Infantry, July 31, 1862. First Lieutenant, Jan. 27, 1863. Mustered out, May 26, 1864. Second Lieutena...
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