This collection contains the military papers of Ralph L. Marlin during his time on active duty in the U.S. Army, as well as his later employment in the U.S. postal service. Marlin, having fought in WWI, remained in the Officer’s Reserve Corps, and was recalled to active duty, at the rank of First Lieutenant, in 1942. He retained this paperwork related to duty appointments, telegrams, letters, classwork, invoices and supply lists, leave requests, certificates of promotion, and insurance information, as well as a yearbook for the military’s time on the campus of St. Norbert College in Wisconsin in 1944, and an Army and Navy Club Directory for 1945.