Explainer-Why are 120,000 people about to move from Nagorno-Karabakh?

A view shows a border-crossing point on the frontier between Armenia and Azerbaijan and a base of Russian peacekeepers deployed in Nagorno-Karabakh as seen from a road near the village of Kornidzor, Armenia, September 23, 2023. REUTERS/Irakli Gedenidze/File Photo

MOSCOW (Reuters) - The 120,000 ethnic Armenians of Nagorno-Karabakh will leave for Armenia as they do not want to live as part of Azerbaijan and fear ethnic cleansing, the leadership of the breakaway region told Reuters on Sunday.

What is going on and what does it mean?