When the Civil War broke out across the United States, almost every member of Delta at Marietta enlisted in the Union Army. Three of the brothers gave their lives fighting for the Union cause. Former chapter presidents William B. Whittlesey and George B. Turner fell on the battlefields of Chattanooga and Lookout Mountain. They willed their personal possessions and their swords to the chapter, which treasured those mementos until the chapter closed for two decades in the mid-1990s.