On Ukraine's front lines, where Russian drones hunt from above and ambulances can't survive the journey, the "golden hour" of battlefield medicine — the 60-minute window to get the wounded to advanced care — is gone.

"There is no such term in our war," says an anesthesiologist with Ukraine's Azov Brigade. In some cases, wounded soldiers have waited not hours, but days — or even weeks — for evacuation.

To adapt, Azov's elite medics are reengineering how war medicine works. Their innovations include drone-delivered blood, battlefield transfusions performed in trenches, and rugged 4x4s turned into stealth medevacs.

Their first success came in a desperate moment: a soldier, hit in the neck by shrapnel, was bleeding out in a trench. Evacuation efforts had failed. Russian hunter-killer drones

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