Drone Swarms Outpace Russian Tank Defenses

The Russian military's attempt to shield its armor from drone warfare met with limited success during a July 22 assault in eastern Ukraine's Donetsk Oblast, as first reported by Ars Technica. Russian forces deployed the Arena-M active protection system—a radar-based technology designed to intercept missiles and rocket-propelled grenades—on T-72B3A tanks.

While journalists Dmytro Putiata and Rob Lee report that the Arena-M successfully shot down some drones, the system was overwhelmed by sheer volume. Euromaidan Press reports that Ukrainian defenders destroyed at least seven T-72B3A tanks, with Ukrainian soldiers noting they required between 15 and 20 drones to destroy each vehicle.

This deployment highlights a critical asymmetry in cost and adaptability. The Institute for the Study of War stated in an August 9 update that the Arena-M likely will not be an effective standalone countermeasure because it can be overwhelmed. Furthermore, kamikaze drones can cost as little as $400, making them a cost-effective trade against tanks worth millions of dollars, even when multiple drones are required for a single kill.

According to Militarnyi, Russian engineers have worked on the Arena-M since 2019, but the system struggles to detect small drones that fly more slowly and unpredictably than traditional missiles. While the Russian military may seek to increase counter-munition capacity, Euromaidan Press notes that turret-mounted launcher space constraints may limit this. This pattern of drone-driven obsolescence extends beyond Ukraine; Ars Technica notes that Israeli Merkava 4 tanks equipped with Rafael Advanced Defense Systems' Trophy active protection systems have also been targeted by Hezbollah quadcopters in Lebanon.