Sigma Phi Society (1827) and Delta Phi Fraternity (1827) were founded at the same school and comprise the Union Triad. In Germany the German Student Corps are the oldest academic fraternities. Twenty-eight were founded in the 18th century and two of them still exist. Most of their traditions have not changed much for the past two centuries. These traditions include academic fencing duels with sharp blades while wearing only eye and neck protection, or regular hunting events, as can be seen in examples such as Corps Hubertia Freiburg, Corps Palatia Munich, Corps Rhenania Heidelberg, or Corps Altsachsen Dresden. At Swedish universities, especially those of Uppsala and Lund, students have organized in nations since the 16th century. These organizations are open to all students who wish to join. Parallel to the nations both Uppsala and Lund play host to a large number of university related secret societies, for both students and older academics. In September 2014, Wesleyan University in America ordered all fraternities with on-campus housing to become co-educational within the next three years. In April 2019 Swarthmore College suspended fraternities on campus due to leaked documents that made reference to a "rape attic" and employed otherwise homophobic, misogynistic and racist language. The University of Texas Arlington also announced that fraternities would be suspended due to concerns about fraternal culture both on campus and nationally. Fraternities have received increased scrutiny in the United States from incidents of hazing or racism that have received national attention. Three members of Beta Theta Pi were sentenced to prison after pleading guilty in charges related to the hazing death of Tim Piazza. Members of Delta Kappa Epsilon were arrested at Louisiana State University in connection with multiple hazing incidents, and the university's chapter was closed. Phi Delta Theta suspended Louisiana State University's chapter following the death of Maxwell Gruver. Four fraternity members were expelled from the University of Georgia after video surfaced showing video of the men using racial slurs and talking about blacks picking cotton.