The collection consists primarily of correspondence from Charles M. Day to his girlfriend (and later his wife) Marguerite King while he was stationed in France during World War I, and letters of their son Henry P. Day to them while he was attending school in Massachusetts and while he was stationed in North Africa and Italy during World War II. Both sets of letters describe living conditions during the war, battles that the men fought in, and descriptions of the countries they were stationed in. Also included in the collection is a “History of Company B” written by Charles M. Day. It includes a list of all the members of that company, a list of those killed in action, a detailed movement-by-movement account of the company’s actions during World War I, a program from a reunion in 1933 (which includes biographical sketches of some of the members of the company, including Charles), and picture of the company. Additionally, there are various publications from World War II including a “Road to Rome” booklet with Henry’s notes in the margins and an “Our First D-Day” magazine.