The lead helicopter hammered across the English Channel at the edge of its performance envelope, close enough to the waves that Lieutenant Gil Amundson thought he could feel a fine mist of sea spray stirred up by their passage through the darkness.

The seven men in his chalk were quiet, each alone in his own cocoon of anticipation and fear. Amundson could hear Sergeant Nunez beside him, reciting rapid-fire Hail Marys, working through a set of rosary beads in what looked to the young cavalry officer like record time. Across the cabin Private Clarke was nervously tapping his heel on the steel plating of the floor, the tempo increasing until it sounded like one of those rock-and-roll drummers. Then he’d curse, punch himself on the leg, and go still for a moment before starting all over again.

On either side of him a couple of the boys were dozing fitfully. Or at least pretending to.

That’s how it went the whole way across. Each man playing out what might be his last hour as he saw fit. Some checked their equipment, before checking their buddy’s. Some leaned over to get a view of the invasion fleet as it headed for the coast. Corporal Gadsden craned his head skyward, the bulky lens of his Gen2 Starlite goggles tracking his gaze as he picked out Dakotas, gliders, Mustang night fighters, and, at one point, a squadron of Sabers miles overhead, all screaming toward France.

Amundson forced himself to go through the plan again. The rapid insertion, the assembly point for his platoon, the mental map of their objective.

He used what little space he had in the chopper to perform a set of isometric exercises, lest his butt fall asleep before they jumped into Hitler’s front garden. He stretched his arms and legs and craned his neck from side to side, a full extension in each direction, which gave him a clear view of the rest of the cav squadron as it thundered toward the enemy in 132 Hueys, with another forty Cobra gunships riding shotgun.