This primary source comes from the Records of the War Department General and Special Staffs.
Full Citation: Photograph 165-WW-469A-44; Recreation - Athletics - Boxing; 1918; Recreation - Athletics - Boxing; American Unofficial Collection of World War I Photographs, 1917 - 1918; Records of the War Department General and Special Staffs, Record Group 165; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/boxing-contest-custer, April 20, 2024]