A reader once typed her own last name into a search box on my website. Thirty seconds later she read six words that changed how she saw her family. Her great-great-grandfather earned the Medal of Honor.

That is the kind of moment I built these tools for. I write novels about the Civil War, and somewhere along the way I started building software too. It began with a simple question. Readers of Cadets to Captains kept asking if their own ancestors fought in the battles I described. I could not...

The Iron Decade: How 1850s Railroads Helped Decide the Civil War

By Tom O'Connor

Before Gettysburg, before Antietam, before the first shot at Fort Sumter, the Civil War already leaned north. The advantage did not begin on a battlefield, camp, or inside a Washington cabinet room. It began beside smoking iron mills, muddy grading crews, timber bridges, and thousands of miles of new railroad track spreading across the North during the 1850s.

In 1850, the United States ran 8,589 miles of railroad....

They Already Knew, The Delafield Commission, Part 1: Three Men, One Ruined City, and the Lessons That Came Home

They Already Knew

The Delafield Commission, Part 1: Three Men, One Ruined City, and the Lessons That Came Home

On July 3, 1863, twelve thousand five hundred Confederate soldiers walked into a mile of open Pennsylvania farmland. Rifles met them at four hundred yards. More than half were dead or wounded before the survivors reached the stone wall.

Every officer on that field knew the...