The Soldier Boy by Oliver Optic

While Tom and his little command were working their way back to the Union lines, followed up by the disorganized band of rebels, a series of most unearthly yells swept over the field, for they had emerged from the woods. It was the rallying cry of the Confederate regiment which had formed in their rear. They were charging upon the Massachusetts -- th; but they might as well have charged upon the Rock of Gibraltar, for presently Tom was delighted to see them retiring before the tremendous onslaught of his friends.

"Hurrah! " shouted he, forgetting the foe in his rear, and pressing forward to that on his front, at the same time changing his course so as to approach the right wing of the rebel regiment.