Delta Sigma Alpha, also known as ΔΣA, was a fraternity at Gotham University.
According to Dick Grayson, the fraternity's membership consisted almost entirely of students from wealthy backgrounds. Three such students were Warren Lawford, Armand Lydecker, and Gunther Hardwicke, who bonded and continued to seek adventure together after they left university. This unfortunately led to their brief experiment with crime, as The Terrible Trio.
Warren made the mistake of wearing his fraternity ring even while in disguise as "The Fox". When he punched Sheldon Fallbrook into unconsciousness, his ring left an imprint that allowed Batman to identify the Trio.