I have Declaration for Pension papers of my paternal grandfather that States he enlisted Aug 3, 1901, Fort Smith, AR to company E, 7th Infantry, US Regular Army. He was discharged 2 Aug, 1904, Ft Wright, WA. He then re-enlisted 12 March 1911, Ft Sheridan, IL to Co G, 27th and transferred to Co B. 27.
Would like to find unit rosters or whatever is available to prove on black and white the military service of my grandfather. Any help would be greatly appreciated. Thanks