First Nagorno-Karabakh War
Then, on 15 June, the Supreme Soviet of Armenia issued a resolution that approved the unification of Nagorno-Karabakh. Two days later, the Supreme Soviet of Azerbaijan reemphasized that the region is a part of their sovereignty, by adopting a counter-resolution. The Regional Soviet in Stepanakert finally decided to annex the region unilaterally and rename it the Artsakh Armenian Autonomous Region. However, on July 18, the Supreme Soviet of the USSR was met in Moscow, which reaffirmed that Nagorno-Karabakh was within the Azerbaijani sovereignty. In other words, the unification of Nagorno-Karabakh was rejected by the Azerbaijan SSR as well as Gorvachev.