World War II posed a crisis to the institution similar to that of the Civil War, as male students began enlisting in the service within a month of Pearl Harbor, and soon only a handful remained on campus. Through an arrangement with the Navy Department, the college survived by becoming a U.S. Naval Flight Preparatory School, and later offered a V-5 Navy Academic Refresher Unit program for officers. Courses were taught by Monmouth's liberal arts faculty. The Navy later adopted portions of Monmouth's curriculum for training programs nationwide. More than 2,000 Navy men went through Monmouth College, a number of whom would re-enroll at the college after the war funded by the G.I. Bill.