The audacious attack in late October was described by one military expert as “a glimpse into the future of naval warfare”.Yevhen, a drone operator with another volunteer group called Aerorozvidka, was a remote-control enthusiast long before he was called up to fight in 2015 following Russia's attempt to annex the Donetsk region.He said: “I thought that if I was already flying over them and if I had a bomb that I could drop, it would be good.” Engineers and military analysts say the key to Ukraine's success has been the flexibility to adapt and get quick feedback from the front line.While the formal Ukrainian military can still be bureaucratic and conservative, individual commanders, particularly at the front line, are often willing to experiment and those higher up can turn a blind eye to restrictions.For example, if you have 10 very expensive and good drones, and the opponent has 1,000, but cheap and of worse quality, then the victory is most likely for the one who has more of them.""