Russian military bases attacked by swarm of home-made drone bombers.

The Russian Ministry of Defence claims its forces in Syria were attacked a week ago by a swarm of home-made drones – the first time such a coordinated assault has been reported in a military action.

While photographs of the improvised UAVs used in the assault make the drones look clunky and strung together, the Russians’ analysis reveals they were armed with explosives and launched from a site more than 50 kilometres (31 miles) distant from their targets, navigating the trek via GPS and altitude-control sensors.

The Ministry says a technical examination indicates these drones would have an effective attacking range of about 100 kilometres (62 miles) – which is pretty terrifying – and means that in the new era of UAV warfare, locations that once may have seemed immune to attack, are in fact exposed.

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