What happened
The soviet of the Nagorno-Karabakh Autonomous Oblast votes to request transfer from Soviet Azerbaijan to Soviet Armenia; mass demonstrations rise in Stepanakert (Khankendi) and Yerevan. Moscow refuses, and the dispute escalates beyond the system's ability to contain it.
The first open territorial challenge of the glasnost era — the moment a stored Soviet border question became live politics, and the starting point of the conflict that would outlast the USSR by three decades.
Confidence: High
See this event in the timeline Interactive: select this record and follow what connects to it.