The Armenian-occupied territories surrounding Nagorno-Karabakh were areas of Azerbaijan, situated around the former Nagorno-Karabakh Autonomous Oblast, which were occupied by the ethnic Armenian military forces of the breakaway Republic of Artsakh with military support from Armenia, from the end of the First Nagorno-Karabakh War to 2020, when the territories were returned to Azerbaijani control by military force or handed over in accordance to the 2020 Nagorno-Karabakh ceasefire agreement. Wikipedia