War. Sebastian Junger

It’s as if the neural pathways flow in both directions, so the expression triggers fear as well as being triggered by it.

      The videotape I shot during the ambush in Aliabad shows every man dropping into a crouch at the distant popping sound. They don’t do this in response to a loud sound—which presumably is what evolution has taught us—but in response to the quieter snap of the bullets going past. The amygdala requires only a single negative experience to decide that something is a threat, and after one firefight every man in the platoon would have learned to react to the snap of bullets and to ignore the much louder sound of men near them returning fire. In Aliabad the men crouched for a second or two and then straightened up and began shouting and taking cover. In those moments their higher brain functions decided that the threat required action rather than immobility and ramped everything up: pulse and blood pressure to heart-attack levels, epinephrine and norepinephrine levels through the roof, blood draining out of the organs and flooding the heart, brain, and major muscle groups.

      “There’s nothing like it, nothing in the world,” Steiner told me about combat. “If it’s negative twenty degrees outside, you’re sweating. If it’s a hundred and twenty, you’re cold as shit. Ice cold. It’s an adrenaline rush like you can’t imagine.”

      The problem is that it’s hard to aim a rifle when your heart is pounding, which points to an irony of modern combat: it does extraordinarily violent things to the human body but requires almost dead calm to execute well. Complex motor skills start to diminish at 145 beats per minute, which wouldn’t matter much in a swordfight but could definitely ruin your aim with a rifle. At 170 beats per minute you start to experience tunnel vision, loss of depth perception, and restricted hearing. And at 180 beats per minute you enter a netherworld where rational thought decays, bowel and bladder control are lost, and you start to exhibit the crudest sorts of survival behaviors: freezing, fleeing, and submission.

      To function effectively, the soldier must allow his vital signs to get fully ramped up without ruining his concentration and control. A study conducted by the Navy during the Vietnam War found that F-4 Phantom fighter pilots landing on aircraft carriers pegged higher heart rates than soldiers in combat and yet virtually never made mistakes (which tended to be fatal). To give an idea of the delicacy of the task, at one mile out the aircraft carrier is the size of a pencil eraser held at arm’s length. The plane covers that distance in thirty-six seconds and must land on a section of flight deck measuring seven yards wide and forty-five yards long. The Navy study compared stress levels of the pilots to that of their radar intercept officers, who sat immediately behind them but had no control over the twoman aircraft. The experiment involved taking blood and urine samples of both men on no-mission days as well as immediately after carrier landings. The blood and urine were tested for a hormone called cortisol, which is secreted by the adrenal gland during times of stress to sharpen the mind and increase concentration. Radar intercept officers lived day-to-day with higher levels of stress—possibly due to the fact that their fate was in someone else’s hands—but on mission days the pilots’ stress levels were far higher. The huge responsibility borne by the pilots gave them an ease of mind on their days off that they paid for when actually landing the plane.

      The study was duplicated in 1966 with a twelve-man Special Forces team in an isolated camp near the Cambodian border in South Vietnam. The camp was deep in enemy territory and situated to disrupt the flow of arms along the Ho Chi Minh Trail. An Army researcher took daily blood and urine samples from the men while they braced for an expected attack by an overwhelming force of Vietcong. There was a serious possibility that the base would be overrun, in which case it was generally accepted that it would be “every man for himself.”

      The two officers saw their cortisol levels climb steadily until the day of the expected attack and then diminish as it failed to materialize. Among the enlisted men, however, the stress levels were exactly the opposite: their cortisol levels dropped as the attack drew near, and then started to rise when it became clear that they weren’t going to get hit. The only explanation the researchers could come up with was that the soldiers had such strong psychological defenses that the attack created a sense of “euphoric expectancy” among them. “The members of this Special Forces team demonstrated an overwhelming emphasis on self-reliance, often to the point of omnipotence,” they wrote. “These subjects were action-oriented individuals who characteristically spent little time in introspection. Their response to any environmental threat was to engage in a furor of activity which rapidly dissipated the developing tension.”

      Specifically, the men strung C-wire and laid additional mines around the perimeter of the base. It was something they knew how to do and were good at, and the very act of doing it calmed their nerves. In a way that few civilians could understand, they were more at ease facing a known threat than languishing in the tropical heat facing an unknown one.

       3

      THE KOP DOMINATED THE CENTER OF THE VALLEY, BUT halfway up the slopes of the Abas Ghar was a small firebase named Vegas. Its purpose was to control access to the Korengal from the east. Vegas was a five-hour walk from the KOP and almost never got into contact, so journalists only went out there if they could catch a resupply from the KOP. Vegas was manned by First Platoon and had a small HLZ—helicopter landing zone—but for a while lacked phone or Internet, and the men were stuck there for weeks at a time. “I guarantee you, half of First Platoon is going to be divorced by the time this is over,” Kearney told me early on in the tour. The cook started talking to a finger puppet as a way of coping, but that unnerved the other men so much that one of them finally destroyed it.

      I never went out to Vegas, but once in a while I’d get to know First Platoon guys who were rotating through the KOP for a hot shower and a call home. One was a sergeant named Hunter, who managed to be both very cynical about the Army and also a very good soldier. I was under fire with him once, he was leaning back against some sandbags saying things that made everyone laugh while sniper rounds went schlaaack over our heads. “We call him Single-Shot Freddy,” his sniper rap went. “We believe he is a blind Afghan man between the ages of sixty-five and seventy…”

      Hunter was known throughout the company for his pantomime of Single-Shot Freddy. He’d pretend to pull himself up a hillside along an imaginary guide rope, all the while muttering, “Allahu Akhbar,” and then unlimber the rifle from his shoulder and feel along the stock for the bolt. Sightless eyes turned heavenward, he’d jack the bolt back, chamber an imaginary round, and fire. Allahu Akhbar! He’d work the bolt and then fire again. I asked Hunter why he thought the sniper was blind. “Because he hasn’t hit anyone yet,” he replied.

      A couple of months into the deployment Hunter came up with the phrase “Damn the Valley,” which quickly became a kind of unofficial slogan for the company. It seemed to be shorthand not for the men’s feelings about the war—those were way too complicated to sum up in three words—but for their understanding of what it was doing to them: killing their friends and making them jolt awake in the middle of the night in panic and taking away their girlfriends and wiping out a year—no, fifteen months—of their lives. Their third decade on the planet and a good chunk of it was going to be spent in a valley six miles long and six miles wide that they might not leave alive. Damn the Valley: you’d see it written on hooch walls and in latrines as far away as the air base at Jalalabad and tattooed onto men’s arms, usually as “DTV.”

      Hunter was not from a military family, and he told me that his decision to join up left his parents proud but a little puzzled. It didn’t matter, he was out here now and getting home alive was the only important issue. It was a weird irony of the war that once you were here—or your son was—the politics of the whole thing became completely irrelevant until very conservative families and very liberal ones—there were some—saw almost completely eye to eye. Misha Pemble-Belkin’s father was a labor organizer who had protested every American war of the past forty years, yet he and his wife were wildly proud of their son. Pemble-Belkin wasn’t allowed to have toy guns when he was young, even squirt guns, so he and his brother picked up crooked sticks and pretended to shoot those instead. The men of Second Platoon shortened Pemble-Belkin’s