World War II led to changes all over the world, including Cornell. All male students had compulsory physical training of at least two hours every week. 200 soldiers stayed at Cornell during the week of April 11, 1942, and five soldiers slept at 1 Edgecliff Place with the ZBT brothers. Many present and former ZBT brothers at the time joined the war effort: Stephen L. Nordlinger ‘19, Eric D. Hirsch ‘21, “Dink” Kalischer ‘23, David M. Sollinger ‘26, Eugene C. Merrill ‘26, Leon L. Landauer ‘27, John W. Waller ‘31, Frederic Salsman ’32, Howard S. Friedman ’34, Earl Rosenblum ‘36, Herbert Hoffheimer Jr. ’34, Shelby N. Lever ’34, Mark Wotiz Jr. ’34, Irwin Harris ’37, Richard Saperstein ’37, Sylvan Cole ’39, Ernest H. Weiner Jr. ’39, Noland Class Jr. ’40, Eddie Arenson ‘42, Justin Brandt ‘42, Fred Guterman ‘42, Mickey Newman ‘42, Jack Kaman ‘43, Jean Saks ‘43, Bud Brandt ‘43, Tony Ach ‘44, and Norm Brandt ‘44.