Complex sentence: All of these pledged to anew their loyalty to a restored Alpha Sigma Phi, and soon afterward the chapters Mu at the University of Washington, Nu at UC-Berkeley, & Upsilon at the Pennsylvania State University were added.
Split into simpler sentences: All of these pledged to anew their loyalty to a restored Alpha Sigma Phi. Soon after the chapters of Mu at the University of Washington, Nu at UC-Berkeley, & Upsilon at the Pennsylvania State University were added.