Imagine being fifteen years old, facing the bloodiest battle ever to take place on U.S. soil: the Battle of Gettysburg. In July 1863, this is exactly what happened to Tillie Pierce, a normal teenager who became an unlikely heroine of the Civil War (1861-1865). Tillie and other women and girls like her found themselves trapped during this critical three-day battle in southern Pennsylvania. Without training, but with enormous courage and compassion,...