sentences:  Notably, Northwestern switched its academic calendar from a semester to a quarter system to facilitate these changes and this quarter system persisted after the war into the present day.During the war, Northwestern trained 49,725 military personnel through eleven training programs.The existing NROTC program proved to be a boon to the university as the War Department and Navy used Northwestern facilities to train 36,124 sailors over the course of the war, leading Northwestern to be called the "Annapolis of the Midwest."