Cambridge, MA--Harvard College has been rocked by sectarian violence in the aftermath of Housing Day, a holy day for many who attend the college. Taking effect next year, a Freshman Dean's Office-Ad Board joint treaty will divide members of the freshman class into more "sustainable" boundaries, letting close ethnic blocking groups share portions of lands surrounding the Yard--the College's shared central region. Some groups feel, however, that they were given less valuable lands for no apparent reason.