The John Prentice Allen Paper, which date from 1930 to 1979, contains correspondence, travel brochures and concert programs, work-related records, and documents relating to military service.

The G. Thomas Edwards papers contain the research and professional papers of Thomas Edwards, a former Professor of History at Whitman College. The collection spans from 1960 to 2017.

The B. Lewis Hurd Walla Walla Army Air Field collection contains research on 22 of the B-24 Bomber pilots who were stationed at Walla Walla Army Airfield in 1945. The research was conducted from circa 1991 to 1994.

The Eugene and Betty Myers Correspondence, which dates from 1943 to 1946, houses letters written by Eugene and Betty Myers during World War II. Eugene Myers served in the army during World War II and went on to work in the Walla Walla school district after the war. Betty Myers worked as a secretary and in education for most of her life.

Before and during World War II, nationwide campaigns mitigated nationwide concerns about sexually transmitted inflections and the health of U.S. soldiers. The Walla Walla County-City Health Department Records and Photographs of Sex Workers in Walla Walla, which dates from 1939 to 1942, houses the health and law enforcement records of sex workers in Walla Walla, Washington.

The Walla Walla War Collection contains materials related to the Civil War, World Wars I and II and the participation of members of the Walla Walla, Washington and Whitman College communities.