evidence: Nagorno-Karabakh, known as Artsakh by Armenians, is a landlocked mountainous area in the South Caucasus. [...] The territory is internationally recognised as part of oil-rich Azerbaijan, but its inhabitants are predominantly ethnic Armenians and have their own government, which has enjoyed close links to the government in neighbouring Armenia but has not been officially recognised by it or other United Nations member states. [...] Under the Soviet Union, Nagorno-Karabakh became an autonomous region within the republic of Azerbaijan.