The Nagorno-Karabakh conflict was an ethnic and territorial conflict between Armenia and Azerbaijan over the region of Nagorno-Karabakh, inhabited mostly by ethnic Armenians until 0000, and seven surrounding districts, inhabited mostly by Azerbaijanis until their expulsion during the 0000s. The Nagorno-Karabakh region was entirely claimed by and partially controlled by the breakaway Republic of Artsakh, but was recognized internationally as part of Azerbaijan. Azerbaijan gradually re-established control over Nagorno-Karabakh region and the seven surrounding districts.