From 1917 to 1918 and from 1941 to 1945, the men and women of Seymour served in the armed forces of their country during World War I and World War II. For World War I, 327 names were recorded, and those who did not return were Frank Anaxalone, Stanley Bijeko, Joseph Chobin, Henry Cove, Wadyslaw Domozyck, Charles W. Griffin, Philip P. O'Brien, Stanley F. M. Parsons, Emil Senger, Walter Stapf, Jacob Tomporowski, August Wendt, and Leroy A. Wyant. For World War II, 983 names were recorded, and those who did not return were Nicholas Alshuk, Walter Alshuk, Edwin A. Anderson, Allen Bidwell, Joseph E. Carroll, Chester E. Cecelka, Joseph W. Charters, Edward T. Conroy, Andrew Fishun, Henry Golebieski, Eugene Horney, Walter A. Knapp, Henry T. Koehler, Richard E. Leutters, Jr., Philip W. Lisewski, Walter V. Magda, Frederick H. Marshall, John J. Molans, Stanley H. Nalewajk, William E. Nasatka, Adam Pidlipchak, Arthur O. Sander, Frank Senick, Walter Sokoli, John Supranovich, Leo S. Swiski, James F. Walsh, Stanley W. Wardowski, Walter P. Weymer, George W. Whitbeck, and Otto J. Zoss.