Contains the following types of materials: correspondence / letters, memoirs, personnel documents, awards / certificates, organizational documents, clippings, newspapers, magazines, leaflets / brochures, diary / journal, maps / charts, photographs. Contains information pertaining to the following wars and time period: World War I (WWI), World War II (WWII), Korean War, Cold War. Contains information pertaining to the following military units and organization: 13th Infantry Regiment; 173rd Airborne Brigade (Separate); 25th Infantry Division; Military Assistance and Advisory Group (MAAG) Iran. General description of the collection: The Ellis W. Williamson papers document the 40-year career and post-retirement activities of an infantry officer. The collection contains degrees and diplomas, an autobiography, Williamson's personal military records, certificates, correspondence, commander's notes and memoranda, topographical maps of Vietnam, booklets, training aids, speeches, newspaper and journal articles (re: Williamson), magazines, presentation material, clippings, photographs, and scrapbooks. The Ellis W. Williamson papers are organized in three series. Series I: Papers, 1917-2002, 8 boxes, covers Williamson's military career as well as his retirement. Included are service records, certificates, commander's notes and memoranda, correspondence, degrees and diplomas, autobiography, memorabilia, newspaper clippings, journal articles, magazines, and Airborne Association newsletters. Series II: Photographs, 1936-2001, 3 boxes, 530 images, personal and official photographs. Series III: Scrapbooks, 1940-1973, 9 boxes, seven scrapbooks, 1936-2001; 3 boxes, 530 images, personal and official photographs. Series III: Scrapbooks, 1940-1973, 9 boxes, seven scrapbooks.