Harrisburg, Pennsylvania, during the American Civil War was the capital of the second largest state in the Union. Located at the intersection of important railroads, Harrisburg was an important supply and logistics center for the dissemination and transportation of materiel for Northern armies. Tens of thousands of new recruits were mustered into service and/or drilled at a series of Harrisburg-area United States Army training camps, including the sprawling Camp Curtin. Confederate forces under Lieutenant General Richard S. Ewell threatened Harrisburg during the June 1863 Gettysburg Campaign, but did not launch any serious efforts to take the city due to being recalled towards Gettysburg by General Robert E. Lee. Pennsylvania Governor Andrew Curtin ordered local workers to erect a series o