KYIV: As the war in Ukraine drags into its fifth year, drones have come to completely dominate the front line — a transformation in modern warfare that is being watched around the world.

Here is a look at the technology that is reshaping the war, four years after Russia launched its full-scale invasion by pouring tanks and men over the border:

- Kill zone -

Ranging from cheap commercial devices designed for civilian use to explosive-packed miniature aircraft, drones are responsible for up to 80 percent of battlefield damage, Ukraine’s Defense Minister Mykhailo Fedorov has said.

“Modern warfare is now impossible without drones,” Koleso, a Ukrainian infantry soldier, told AFP in eastern Ukraine.