The 157th, 158th, 159th, 160th, and 161st regiments of infantry, 27th and 28th batteries of light artillery, Company D, 2d U.S. engineers, 14th Signal corps company and 1st and 2d separate companies, Ind. volunteers, colored. Copied from Record of Indiana volunteers in the Spanish-American war 1898-1899 at The Library of Congress referencing the ebook above.
28th Battery on page 62 and page 339 in the Record of Indiana volunteers in the Spanish-American war 1898-1899; by Indiana Adjutant General's Office; Indiana. General Assembly, 61st, 1899 Publication date 1900 on Archive.org. It was organized October 26, 1888 as a Gatling Gun Squad, then as a Battery July 1, 1887, with many from Fort Wayne. BTW the Gatling gun was patented November 4, 1862 by Dr. Richard Jordan Gatling a medical doctor in Indianapolis.