Combat drones or Unmanned Combat Aerial Systems/Vehicles (UCAVs) refer to automated aerial vehicles, equipped with the capacity to carry and deploy lethal weapons such as missiles or bombs. They are characterised by their maximum take-off weight (less than 150 kgs, 150–600 kgs, and more than 600 kgs) or flight features (High Altitude Long Endurance, and Medium Altitude Long Endurance). Enabled by Artificial Intelligence (AI), the use of these drones has become increasingly popular in combat and counter-terrorist missions.