Complex geography and domestic politics mean a solution remains elusive.
New escalation threatens the outlook for engagement, despite the clear benefits for both sides.
Armenians living in the Lachin corridor, which will soon be handed over, refuse to leave.
The plan to allow third-country nationals to cross is seen as the next step towards full normalisation between the two neighbours.
Locals warn that the clear demarcation of Armenian-Azerbaijani territory is key to their security.
A series of blasts in Moldova’s separatist region have heightened fears of regional destabilisation.
Anger over potential plans to drop the decades’ long demand for territory’s independence.
With Russian peacekeepers in Nagorny Karabakh, the region is Baku’s Achilles’ heel.
As talks grapple with cease-fires and humanitarian corridors, the outlines of a deal are in view.
Erdogan seeks the status of intermediary in resolving the current crisis.