This collection relates to Rober L. Baseler's career as a Fighter Ace, with a focus on his service during World War II.

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.

Major Thomas Walter Jackson (1916-1942) was a United States Army Air Corps pilot and squadron commander who served in the Aleutian Island campaign during World War II. The collection contains textual materials, photographs, and a digitized film clip pertaining to the 1938-1942 military service of Jackson.

Carol (Nicholson) Lewis (1923-1987) joined the Women Airforce Service Pilots (WASPs) in 1943 and was assigned to Moore Air Base (Texas), Class 44-W-7. The collection includes official documents, photographs, correspondence, clippings, and ephemera related to Lewis' 1943-1945 WASP service. A small amount of correspondence and ephemera concerning her marriage is also included in the collection.

Lt. Col. James C. Stewart (1919-2004) was born in Corona, California. He joined the Army Air Force, graduated from flying school in August 1940, and was assigned to the 56th Fighter Group which was stationed in England during World War II. The collection primarily covers Lt. Col. Stewart's 1943-1966 military service with military records, personal documents, photographs, clippings, assorted ephemera, and films.