The Lexington Triad is a group of three fraternities founded by students from colleges in Lexington, Virginia during Reconstruction following the American Civil War.
Members of the triad include Alpha Tau Omega (founded in Richmond, Virginia in 1865 by students from Virginia Military Institute (VMI) in Lexington), Kappa Alpha Order (founded in 1865 at Washington and Lee University (not to be confused with the Kappa Alpha Society), and Sigma Nu (founded in 1869 at VMI). The national headquarters of both the Kappa Alpha Order and Sigma Nu are located in Lexington.
The members of the Triad are sometimes also grouped as part of the Virginia Circle, which includes several other fraternities founded in Virginia roughly during the period of the Lexington Triad: Kappa Sigma and Pi Kappa Alpha at the University of Virginia, and sometimes Sigma Phi Epsilon at Richmond College.
Read more about this topic: Triads (fraternities)