On September 6, 1946, Alpha Kappa Pi merged with Alpha Sigma Phi. Alpha Kappa Pi had never had a national office, but was still a strong fraternity. During the war, they had lost many chapters and realized the need for a more stable national organization. Alpha Sigma Phi expanded again in 1965 by five more chapters when it merged with Alpha Gamma Upsilon. The 1980s found a younger generation of leaders taking the reins of the fraternity. Keeping in mind one of its oldest traditions, being a fraternity run by undergraduates, the leadership and undergraduates began expanding in new directions.