Sarah Emma Edmonds started pretending at a very early age. Her father only wanted sons, so Sarah pretended to be one. Unlike most kids, though, Sarah never really stopped pretending. In 1861, during the U.S. Civil War, Sarah pretended her way into the Union Army, becoming a male nurse named Frank Thompson. Being a nurse didn't quite satisfy Frank, though. She wanted to keep her fellow soldiers from getting hurt. So when the Union Army needed a...