Armenian volunteer units during the First Nagorno-Karabakh War
The term fedayee was originally used during the Armenian national movement of the late 19th and early 20th centuries. Still, it was also used to refer to the Armenian irregular forces in the early 1990s when the dispute with Azerbaijan over Nagorno-Karabakh was turning into the First Nagorno-Karabakh War.
Source: Wikipedia — Armenian volunteer units during the First Nagorno-Karabakh War (CC BY-SA 4.0)