Armenian-occupied territories surrounding Nagorno-Karabakh
The Armenian-occupied territories surrounding Nagorno-Karabakh were areas of Azerbaijan, situated around the former Nagorno-Karabakh Autonomous Oblast (NKAO), which were occupied by the ethnic Armenian military forces of the breakaway Republic of Artsakh (or the Nagorno-Karabakh Republic) with military support from Armenia, from the end of the First Nagorno-Karabakh War (1988–1994) to the Second Nagorno-Karabakh War in 2020 (with the exception of the Lachin corridor). The surrounding regions were seized by Armenians under the justification of a "security belt" which was to be traded for recognition of autonomous status from Azerbaijan.
Source: Wikipedia — Armenian-occupied territories surrounding Nagorno-Karabakh (CC BY-SA 4.0)