Alpha Delta National Fraternity (ΑΔ) is a college fraternity with 6 chapters in the United States. Alpha Delta was initially formed by 14 men representing four colleges and universities at the Henley Park Hotel in Washington, D.C. on August 4, 2007. The fraternity is composed of former Alpha Phi Omega chapters that chose to maintain all-male membership after that organization became co-ed. Alpha Delta's cardinal principles are leadership, brotherhood, and service.