"The country had only 600 trained nurses at the start of the Civil War. All were Catholic nuns. This is one of the best-kept secrets in our nation's history," Father William Barnaby Faherty once wrote. When the Civil War broke out, the Union and the Confederacy were prepared to fight, but they weren't prepared to care for the wounded that their fighting created. While many people volunteered to care for the soldiers, the only ones with any experience were Catholics sisters. Among the sisters, the most-experienced were the Daughters of Charity based in Emmitsburg, MD. When war broke out, they...