Ukraine-Russia: Hidden tech war as Slovyansk battle looms

 "Right now, we have two big battles," says Dmytro Podvorchanskyi, a soldier with Ukraine's Dnipro 1 Battalion. "The first is an artillery battle," he says, "the second is a battle of technologies".

Dmytro is fighting that second, largely unseen war. He leads a unit of just 10 soldiers who form Dnipro 1's drone intelligence unit. Dmytro says he prefers to call it "IT guys who fight". All of them are volunteers. Most of them have a background in information technology, and knew each other before the war started.

On a mobile phone one of the team shows us drone footage of the Russian targets they've already destroyed - their "greatest hits".

Dmytro lists them: "One tank, three or four artillery guns, two mortar positions and five or six ammunition dumps."

"Good results for just 10 people," he says, before breaking into a smile. They've already been fighting in Rubizhne and Severodonetsk - cities captured by the Russians. Now they're getting ready to defend Slovyansk.

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