Alpha Tau Omega Fraternity was founded on September 11, 1865 to help heal the wounds of the North and South caused by the Civil War. ATO now ranks among the top 10 national fraternities for number of chapters and total number of members. We have in excess of 245 active and inactive chapters with more than 196,000 members and over 6,500 undergraduate members. ATO was founded by Otis Allan Glazebrook, Erskine Mayo Ross, and Alfred Marshall at the Virginia Military Institute and was not established in imitation of or in opposition to any existing fraternity. ATO was founded upon brotherly love, with Christian principles, not Greek principles, as the cornerstones of the Fraternity.
-Taken from the Alpha Tau Omega National website ato.org
The Vanderbilt chapter of Alpha Tau Omega, the Beta Pi chapter, was founded in 1889.