Footage from the 2020 war between Armenia and Azerbaijan in the Nagorno-Karabakh region, also known as the Second Karabakh War, demonstrates the horrifying sounds of incoming "Harop" loiter munitions, A.K.A. suicide drones, onto Armenian positions.
The sound of the Israeli-made Azeri kamikaze drones is eerily reminiscent of the legendary WWII German Luftwaffe's Junkers Ju 87 "Stuka" dive bomber on an attack run. The horrifying sound of the incoming suicide drone may give the targets time to scramble for cover, but the sound also inflicts mental casualties on the targeted units.
Loiter munitions, often referred to kamikaze drones or suicide drones, are unmanned, sensor-rich aerial munitions that can be used in an autonomous manner in which it loiters on station until it detects preprogrammed target signatures such as enemy radar sites or communications transmissions. It then dives directly onto the target, detonating its payload on impact. The Kamikaze Drone may also be remote controlled by a human pilot from a relatively safe location to destroy various targets of opportunity.
The 2nd Karabakh War broke out in late 2020 when Azerbaijan entered into territory that is politically theirs, but was controlled by ethnic Armenian local governments. Azerbaijan's years of investments into advanced military hardware, including various unmanned aerial systems resulted in a short and brutal decisive victory over the Armenian military, which relied heavily on near-obsolete Cold War-era equipment and weaponry.