Region
United States--History--Civil War, 1861-1865--Personal narratives, Union
4
United States--History--Civil War, 1861-1865
2
United States--History--Civil War, 1861-1865--Military tactics--Union
2
Philadelphia (Pa.)--History--Civil War, 1861-1865
1
United States--Army--African American troops--History--19th century
1
United States--Colored Troops
1
United States--Colored Troops--History
1
United States--History--Civil War, 1861-1865--24th U. S. Colored Infantry
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--Participation, African American
1
United States--History--Mexican War, 1845-1848
1