The combat they had endured for almost 24 hours was characterized by an intensity of firepower never previously seen in Civil War battles, as the entire landscape was flattened, all the foliage destroyed. An example of this can be found in the Smithsonian Museum of American History: a 22-inch stump of an oak tree at the Bloody Angle that was completely severed by rifle fire. There was a frenzy to the carnage on both sides. Fighting back and forth over the same corpse-strewn trenches for hours on end, using single shot muskets, the contending troops were periodically reduced to hand-to-hand combat reminiscent of battles fought during ancient times. Bodies piled up four and five high, and soldiers were forced to pause from time to time and throw corpses over the parapet since they formed an obstacle in the way of the fighting. Dead and wounded men were shot so many times that many of them simply fell apart into unrecognizable heaps of flesh.