On Sept. 17, 1862, 78 people - 71 young women and 7 men - died when the Allegheny Arsenal in the Lawrenceville neighborhood of Pittsburgh exploded. This was the largest single day civilian death toll of the Civil War, but it was overshadowed because of events that happened in Sharpsburg, Maryland at The Battle of Antietam.
Federal Artillery Takes Cemetery Hill, Gettysburg Battlewalk
The Confederate Flag, Civil War Institute
Battle of Monterey Pass, Battlefield Pennsylvania