America's Civil War raged for more than four years, the three days of fighting in the Pennsylvania countryside in July 1863 continue to fascinate, appall, and inspire new generations with their unparalleled saga of sacrifice and courage. No battle was as deadly or dramatic as Gettysburg. More lives were lost there than in any other war fought on American soil. From Chancellorsville, where General Robert E. Lee launched his high-risk campaign into...