Since Moscow can’t produce enough ballistic and cruise missiles, it is outsourcing many of their missions to far cheaper drones.

Both Moscow and Kyiv use them for armed attacks as well as surveillance, making it hard for combatants to hide.

Both Ukraine and Russia are operating fiber-optic drones, which can't be jammed with traditional electronic warfare tactics.

In the three years since Russia launched its full-scale invasion, Ukraine has almost certainly become the largest producer of drones in the Western-aligned world. Early workshop tinkering on mainly commercial Chinese drones evolved into steadily more professional and massive production of domestic unmanned aerial systems (UAVs).