The Ukrainian soldier, volunteer Kostyantyn Vlasenko, who became the first person to be evacuated using a UAV in the war spent 491 consecutive days at his position in a concrete drainage pipe. His comrade was killed in a Russian attack, and Vlasenko suffered significant injuries, forcing him to amputate both of his legs himself with an ordinary knife. He survived on water and food delivered by Ukrainian drones. Soldiers remaining in their positions without rotation for over a year is not uncommon in the Ukrainian Army, and is caused due to a number of reasons, including deep Russian infiltrations behind their lines making evacuation almost impossible, and commanders refusing to withdraw their troops. War is hell.