In the fall of 2022, Kyiv faced a difficult problem. The Russians were bombarding Ukrainian cities with swarms of Iranian Shahed drones. The challenge was spotting them, since their low altitude, small size, and stealthy design made them hard to follow on radar.

Axar.az informs that this was stated by Christian Caryl in an analysis published by "Foreign Policy."

A pair of Ukrainian engineers quickly jury-rigged a solution. Today, the country is blanketed with a network of 9,500 microphones mounted on six-foot-tall poles. The microphones, which are attached to cell phones, track the Shaheds by sound (the propeller-driven drones have loud engines) and send that data to a central system that calculates their courses. That information is then passed on to iPad-wielding soldiers in gun trucks that shoot down the slow-moving drones. Each sensor pole in the network costs less than $500—which makes the entire network, known as Sky Fortress, cheaper than a pair of Patriot missiles.

I experienced Sky Fortress in action during an extended visit to Kyiv last fall. Shaheds, which sound a lot like lawn mowers in the sky—passed over my apartment building several times. Ukrainian air defenses succeeded in shooting down the majority of them, and they did so at a fraction of the cost of Western-supplied anti-aircraft systems.

All this should explain why I wasn’t entirely surprised when I heard about last weekend’s shrewd Ukrainian drone attack on air bases deep inside Russia. Operation Spiderweb, which appears to have inflicted serious damage on Russia’s strategic bomber fleet, brilliantly exemplifies the Ukrainian way of war, born out of Kyiv’s struggle to survive attacks from an enemy with far larger manpower and resources. This disparity has forced the Ukrainians to get creative, bypass traditional bureaucracies, and empower soldiers and entrepreneurs in the search for unorthodox solutions that quickly address battlefield needs. Since it largely ignores traditional military hierarchy and its slow, top-down processes, one might call Ukraine’s new philosophy “flat war.”

Please read the full analysis here.