As the world becomes more connected through the Internet, it's becoming easier for scholars to turn up data about the Civil War.
Libraries and museums are increasingly putting information online, and this is helping scholars turn up data as well as question long-held views.
For example, it had been generally accepted that 618,222 men died in the conflict. Just last year, research recalculated that toll using scientific methods — and found it was likely much higher at 750,000.
Here are three of the latest Civil War books with some new facts.
"WHAT THE YANKEESDID TO US"
Solomon Luckie, a well-known free African-American barber, was killed in August 1864 by one of tens of thousands of Union artillery rounds fired into Atlanta's still bustling downtown area, weeks after Union forces had defeated Confederates in a series of bloody battles on the outskirts of town.
The shell that killed him ricocheted off an iron Atlanta Gas Light Co. lamppost, which stands today in Underground Atlanta on the very spot it was located on Luckie's unlucky day.
No one knows where Luckie is buried. His remains likely lie in Oakland Cemetery, known as City Cemetery in 1864, when it was a very active place, even in the thick of shelling, says Stephen Davis in his book, "What the Yankees Did to Us: Sherman's Bombardment and Wrecking of Atlanta" (Mercer University Press, $35).
The richly documented tome, published by Mercer University Press, is breathtaking as a scholarly work. It's so meticulously researched, it can only be objective— which had to require extraordinary effort by Davis, who clearly feels Sherman was far too ruthless.
It is based on hundreds of eyewitness accounts recorded in letters and diaries by soldiers on both sides, plus women and children.
Davis writes Sherman didn't care whether shells killed or wounded innocent civilians, and they did, including women and children.
After rebel soldiers had been defeated in battle, civilians endured 37 days of relentless shelling, holed up in caves, basements and "bombproofs." Soon after Sherman's men marched into the city, he ordered it wrecked and burned.
Thanks to Sherman, Atlanta is considered one of the most burned cities in U.S. history, along with Chicago and San Francisco.
Davis, 64, who has been working on the book off and on since 1990, says he uses "Yankees" as Southerners did during the war.
"In writing this book I wanted to return to the time of the war and re-experience what my people and the city had endured," he said.
The author says Sherman "should be called out" for his merciless conduct, citing a telegram to then-Secretary of State Edwin Stanton asserting "there is a class of people, men, women and children, who must be killed or banished before you can hope for peace and order."
Sherman often was quoted as saying war is hell. Davis's book shows in chilling detail that, in Atlanta, it surely was.
"THE FALL OF THEHOUSE OF DIXIE"
Some scholars still dispute slavery was the main cause of the Civil War, in part because only 25 percent of Southerners owned human beings. But those classified as "planters" owned 20 or more, and some hundreds or thousands, and it was this elite class that wielded the most power.
They pushed hardest for secession and ultimately undermined the fledgling Congress of the new republic, writes Bruce Levine, a University of Illinois historian and author of "The Fall of the House of Dixie: How the Civil War Remade the American South" (Random House, $30).
When the powerful men — accustomed to controlling armies of slaves — left to join the fighting, it became more difficult for those at home to control the crumbling economy, as well as workers in the field, once they'd sensed freedom was coming.
The Confederacy cracked from the inside, says Levine, whose book was based on "30-some odd years of research and teaching." By late in the war, increasing numbers of Southerners saw the struggle as a "rich man's war and a poor man's fight," which was especially true since some slave owners were exempt from the draft.
"AFRICAN-AMERICANFACES OF THE CIVIL WAR"
Ronald Coddington's latest pictorial album of Civil War soldiers, "African American Faces of the Civil War" (Johns Hopkins University, $20.99), took longer to research and write than its two predecessors, "Faces of the Confederacy" and "Faces of the Civil War." It was more difficult to find information for essays that go with each of 77 images of African-American soldiers.
Like the previous two, the book is packed with small, scratchy photos, but this is solely on African-Americans — infantrymen, cooks and teamsters.
His essays are full of detail.
"I think it would be next to impossible to research this kind of book in any other time than the Internet age," Coddington says.