This collection contains three journals and sixteen letters authored by Leroy M. Sullivan, a Flight Lieutenant in the Royal Canadian Air Force, during World War II from 1941 to 1943, when Sullivan was killed in action.

Leroy M. Sullivan diaries series contains Sullivan's journals recorded during his service in the Royal Canadian Air Force during World War II from the date of his enlistment on February 8, 1041 until his death in Noveumber 1943. The diaries document Lieutenant Sullivan's participation in campaigns in England, South Africa, Sudan, and Egypt.

Leroy M. Sullivan correspondence with Grady M. Long series contains letters handwritten by Lieutenant Sullivan to Long, detailing the lieutenant's deployments with the Royal Canadian Air Force during World War II from 1941 to 1943. The letters detail daily life in the military, especially the ways in which he and his fellow soldiers spent their time between operations.

Leroy M. Sullivan photographs and newspaper clippings include a single portrait of Lieutenant Sullivan taken in Cairo, Egypt, and facsimilies of newspaper clippings that detail Sullivan's service in the Royal Canadian Air Force under the command of the British Royal Air Force from 1941 to 1943. The clippings also provide information regarding Sullivan's death in England.