The collection documents Lewis A. Wileden's military service during World War I, including personal notebooks, military vouchers and orders, and personal reports. Also present is a 1919 copy of the Second Division newspaper, The Indian, a small publication about the accomplishments of the division during the war, a scrapbook of postcards and photographs of Europe, postwar correspondence with the Second Regiment Engineers, wartime newspaper clippings, and military identification papers, one of which holds a photograph of Wileden. The collection includes a personal synopsis of his war experiences and copies of speeches he made concerning the war in later years.

Michigan Agricultural College (now Michigan State University) materials include a personal expense notebook, social programs, a scrapbook including photographs of family and friends from the Ortonville and Lansing (Michigan) areas, programs, invitations, and ribbons, and articles and programs of alumni events.

Postwar materials include veterinary accounts, records, and day books, articles, records of his service with the Ingham County (Michigan) Health Department, the Mason (Michigan) City Council, and his jury duty tenures, speeches, and personal correspondence. There are also numerous materials relating to his accident on the Grand Trunk Railway system in 1941, his claim against the railroad company, his medical expenses, and a hospital diary. Also an account of his 1949 hernia operation and a scrapbook of get well cards from both hospital stays.