 The Su-27 has replaced the aging Mikoyan-Gurevich MiG-21, which was the main air superiority fighter of the EtAF between 1977 and 1999.The Su-27 entered Angolan service in mid-2000 during the Angolan Civil War.It is reported that one Su-27 in the process of landing, was shot down by 9K34 Strela-3 MANPADs fired by UNITA forces on 19 November 2000.