Civil War Trails has a fantastic interactive map that will provide you with leads on the location of their signs:
The Civil War Trails program has installed more than 1,000 interpretive markers at Civil War sites in Virginia, Maryland, Tennessee, West Virginia and North Carolina.
www.civilwartrails.org
If you go to Hanover, PA there was a cavalry battle on June 30, 1863. At Wrightsville, one of the most dramatic incidents of the Gettysburg campaign took place when the militia burned the bridge as they retreated to Columbia.
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