In order to better understand the effect of war of campus, this graph depicts the enrollment of Oregon State University during the WWI and WWII period.
Oregon State University Student Enrollment: 1911 - 1950 (War Times Bolded)
Another look at the previous date range, however, this is broken down into the Male and Femal enrollment in order to show how these two populations varied due to war. As you can see, WWII had the greatest effect of all the wars, and effected mainly the male population which is to be expected.
Oregon State University Student Enrollment: 1911 - 1950 (War Times Bolded) Male vs. Female