On September 15, 1991, Chi Delta Omega was born. This group of eighteen girls decided that Christian Brothers' existing Greek system needed another outlet. They were not out to replace or diminish other organizations, but rather to help provide a new alternative in which they could express their social interests. They hoped their new group would be beneficial to all existing groups in working together for the betterment of CBU.
The group was a group of close friends. Together they chose the name, Chi Delta Omega. They decided that blue and green would be the group's colors. Quickly, they became organized and began gaining the respect of everyone who witnessed their hard work and dedication. The group was striving toward the ultimate goal of affiliating with a national sorority.
Throughout the 1991-1992 academic year, Chi Delta Omega functioned as a sorority. They had officers, an advisor, a philanthropy, dues, weekly meetings, study hours, fundraisers, and various other projects that showed their extreme dedication to attaining their goal.
In the Spring of 1992, Chi Delta Omega decided to take additional members. Not yet approved by Panhellenic, they held a very successful informal rush. Eighteen girls who shared their dreams joined the group.
With approval pending from Panhellenic and Senate, Chi Delta Omega participated in its first formal rush, and eleven more sisters were added to the family. After being approved by Senate, Chi Delta Omega could finally begin the process of extension, which is the first step to becoming a national sorority. Alpha Xi Delta and Phi Mu visited CBU, and each sorority made presentations to the group. The decision was made that Chi Delta Omega would become a colony of Alpha Xi Delta, and on February 27, 1994, the members of Chi Delta Omega were pledged into Alpha Xi Delta. On April 30, 1994, the Theta Pi chapter of Alpha Xi Delta was installed at Christian Brothers University.