Even though the Civil War has been thoroughly studied for over 160 years, new discoveries are still being made. Last spring, a Civil War-era cannonball was found in the backyard of a Virginia home.

The Civil War lasted from 1861 to 1865, meaning it was over years before Trump's guess. This prompted immediate jokes and mockery online, with many users accusing the president of not knowing ...

Civil War remains found at Colonial Williamsburg, archaeologists say. Virginia archaeologists recently came across four skeletons dating back to the Battle of Williamsburg, which was fought in 1862.

And finally, there was a breakthrough, and they found it. A 1936 map of U.S. 60. Only on that version of the map is a notation: "Civil War Grave Mound" on the Bryan family farm.

A white Illinois teen attaches himself to a regiment of Black Union soldiers in the satirical Civil War novel "How to Dodge a Cannonball." NPR's Ayesha Rascoe talks with author Dennard Dayle about it.