The fighting on the first day at Gettysburg on July 1, 1863, was unexpected, heavy, confusing, and in many ways, decisive. Much of it consisted of short and often separate simultaneous engagements or "firefights," a term soldiers often use to describe close, vicious, and bloody combat. Several books have studied this important inaugural day of Gettysburg, but none have done so from the perspective of the rank and file of both armies. Now in paperback,...