in 1947.

The next two decades were a time of steady growth for Alpha Epsilon Pi, as well as other college fraternities. However, with the onset of fighting in Vietnam in the early 1960s, fraternity life faltered. Liberal student bodies revolted against authority and the Greek system, which was seen as a conservative, elitist group. Membership plummeted and nearly half the chapter roll was lost. However, the fraternity was able to reverse the trend and stabilize membership numbers by 1975, following the end of the Vietnam War.