 Complete the following phrase:  The CUP was first established as the Committee of the Ottoman Union Ottoman Turkish: İttihad-ı Osmanî Cemiyeti in Constantinople now Istanbul on 6 February 1889 by a group of medical students of the Imperial Military School of Medicine. Between 1906 and 1908 it was known as the Committee of Progress and Union CPU , but changed its name back to the more recognizable Committee of Union and Progress CUP during the 