Hamilton "Ham" Coolidge (1895-1918) was one of many young men from wealthy New England families who enlisted during World War I. The collection contains materials related to Captain Coolidge's service a pilot with the U.S. Army Air Service 94th Aero Squadron. Coolidge achieved Ace status, was awarded the Distinguished Service Cross, and was killed in action.

Ray (1894-1969) and Leonard (1888-1971) Grimshaw were brothers who served as mechanics during World War I. The collection contains correspondence, military documents, photographs, clippings, newspapers, a diary, and booklets primarily relating to the military service of Ray M. Grimshaw but also includes a small selection of correspondence from his brother, Leonard.

The collection contains four photographs of fighter pilots who served during World War I and one photograph of a Fokker Dr.I Triplane (F.I).

Harold A. McGinnis (1893-1986) served in the U.S. Army Signal Corps, Aviation Section as a pilot during World War I and remained in the military until his retirement in 1948. The collection contains pilot log books relating to World War I and photographs relating to World War I and pre-World War II era military aircraft.

The Odell Family Collection primarily consists of field message books and printed ephemera used during World War I by Lieutenant James H. Odell of the Royal Flying Corps Canada. There is also a small amount of photographs featuring aircraft of the 1920s-1930s.

The collection contains a signed black-and-white portrait of World War I pilot and ace Eddie Rickenbacker and a certificate celebrating the 50th anniversary of United Airlines.