On the afternoon of Dec. 4, 2006, a Humvee rolled through the narrow streets of Adhamiya, a tense neighborhood in northeast Baghdad. It was one of hundreds of patrols that had blurred together for the men of 1st Platoon, C Company, 1st Battalion, 26th Infantry Regiment. The mission that day was the same as it had been for months: show presence, deter sectarian violence, and make it just a little harder for insurgents to own the streets. Ross Andrew McGinnis Grew Up Wanting to Be a Soldier In...