From the Wikipedia page [1]
The Nagorno-Karabakh Autonomous Oblast= was an autonomous oblast within the borders of the Azerbaijan Soviet Socialist Republic, mostly inhabited by ethnic Armenians. It was divided into five raions or administrative divisions:
- Mardakert District (NKAO)
- Martuni District (NKAO)
- Shusha District (NKAO)
- Askeran District (NKAO)
- Hadrut District (NKAO)