Region
Pennsylvania--Politics and government
2
Philadelphia (Pa.)
2
United States--History--Civil War, 1861-1865
2
Philadelphia County (Pa.)
1
United States--History--Civil War, 1861-1865--Engineering & construction
1
United States--History--Civil War, 1861-1865--Maps
1
United States--History--Civil War, 1861-1865--Military tactics--Union
1
United States--History--Civil War, 1861-1865--Personal narratives, Union
1
United States--Politics and government--1861-1865
1