The American Civil War was the first war to be truly photo-documented. The haunting images stare back at us and make the brutal conflict real and humanize the tragedy. Yet, for all of the photos, many of the identities of the individuals captured are now unknown. Today, Civil War Photo Sleuth is using modern-day technology to rediscover the lost identities in American Civil War-era photographs. This new endeavor holds tremendous potential not only to uncover the lost history of the Civil War–but of countless other anonymous photographs. On this week’s PreserveCast, we’re talking artificial intelligence, Civil War history and the future of historical investigations.