Sigma Nu (ΣΝ) is an undergraduate college fraternity founded at the Virginia Military Institute in 1869.

Since its founding, Sigma Nu has chartered more than 279 chapters across the United States and Canada and has initiated more than 235,000 members.

[6] Hopkins shared his ideas with Quarles and Riley, and in October 1868, the three came together on a limestone rock on the edge of the VMI parade ground to form the Legion of Honor.

On January 1, 1869, the founders, along with the rest of the members of the Legion of Honor, held their first official meeting as Sigma Nu.

Some conflict arose because Arthur had been a member of the Honduras Emigrant Society and had included some influences from that organization in the constitution.

[10][11] This first chapter of Sigma Nu chose as its motto nulli secundus, a Latin phrase meaning "second to none.

[13][14] Kappa chapter was established in 1881 at North Georgia College & State University, giving the fraternity an important member, John Alexander Howard.

[12] Howard's editorials in The Delta inspired Isaac P. Robison, founder of Lambda chapter, to propose a convention for the national fraternity.

On July 10, 1884, Sigma Nu's first convention was held in the Maxwell House Hotel in Nashville, Tennessee.

[23] The program trains candidates in general life skills, with an emphasis on alcohol use disorder awareness.

In 1945, William Yates (University of Pennsylvania) inspired the formation of the "Sigma Nu Inc., Educational Foundation".

Laws are discussed and voted on by the collegiate representatives in Robert's Rules of Order style business meeting conducted by the national regent of the fraternity.

It sets membership requirements, standards of conduct, and the framework for the operation of all entities of the fraternity, including collegiate chapters.

[30][31] The High Council serves as the board of directors of Sigma Nu Fraternity, Inc. and is elected by the Grand Chapter.

[30] There are five roles on the High Council: the regent, who acts as the national president and chairman of the board of Sigma Nu for a term of two years; the regent-elect, the grand treasurer; the vice-regents, appointed members of the board; and the collegiate grand councilmen, who serve as collegiate representatives to the High Council.