Company F, Ninety-ninth Regiment By August, 1862, a full company had been raised at Brookston and vicinity, which was incorporated into the Ninety-ninth Regiment, with George W. Gwinn as captain, Andrew Cochran, first lieutenant, and G. S. Walker, second lieutenant. About the same time Capt." Sidney W. Sea and others enlisted one-half of Company K, Nineteenth Regiment (Fifth Cavalry), the recruits coming mostly from the western part of the county. Captain Gwin's Company F, of the Ninety-ninth Regiment, was ordered to South Bend and was mustered into the service in October, 1862. It did not get into action until the following May, during the Vieksburg campaign. At Jackson, Mission Ridge, Chattanooga, Resaca, Dallas, Kenesaw Mountain, Atlanta, Savannah and Fort McAllister, it became thoroughly fireproof during two years of battling and cam- paigning.
source: "A Standard History of White County, Indiana..."