The ability to hide and launch surprise attacks makes the UAV a weapon widely used by Azerbaijan in conflict with Armenia.

Azerbaijan's Defense Ministry recently has been constantly posting videos of unmanned aerial reconnaissance (UAVs) monitoring the position of Armenian troops under air strikes, as well as live images from suicidal UAVs plunging into targets since the conflict

Experts say that UAVs are playing a large role in the conflict between Azerbaijan and Armenia.

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Not only detecting and monitoring the enemy, many armed UAVs can immediately launch air strikes on the target with a much higher success rate than the air strike of a manned fighter.

Unmanned aerial vehicles and suicidal UAVs built by Israel, Turkey and Russia, as well as a slew of Azerbaijan domestic aircraft have resulted in Armenia losing a large number of armored tanks, artillery and anti-aircraft missiles.

One of the weapons widely used by Azerbaijan is the Harop suicide UAV developed and manufactured by Israel Aviation Industry Corporation.

Compact size, applying many technologies to reduce radar reflection cross-section make Harop able to hide in front of enemy air defense systems, becoming an "invisible killer" for outdated weapons such as anti-aircraft

Harop is optimized for the task of suppressing enemy air defenses thanks to its ability to automatically follow the radar waves and plunge into the source.

Israel also supplies Azerbaijan with a wide range of short and medium range reconnaissance UAVs such as SkyStriker, Orbiter 1K, Orbiter 3, ThunderB, Hermes 450, Hermes 900 and Heron TP.

SkyStriker made by Elbits Corporation, is smaller than Harop and can hover over the target area within 2 hours, a range of 20 km and carries a 5 kg warhead.

Turkish Bayraktar TB2 armed UAVs also appeared in conflict, although it is not clear who operated them.

The TB2 model is 6.5 m long, wingspan 12 m, maximum takeoff weight 650 kg, capable of operating for 27 hours continuously at a distance of 300 km from the control station.

Bayraktar TB2 has fought in Libya and destroyed at least 3 Pantsir-S1 air defense systems supported by the United Arab Emirates (UAE) to the Libyan National Army rebels.

Some sources believe that Azerbaijan is also converting many An-2 light transport aircraft into unmanned aircraft.

"It is clear that the modern battlefield space is slowly changing because of the emergence of invisible assassins such as armed drones and suicide UAVs. They are very cost effective, operators are not.