Subjects
- Underground Railroad -- Ohio1
- Underground Railroad -- West Virginia1
- Underwater exploration1
- Union names.1
- Unions.5
- Uniontown, PA - Methodists.1
- United States - Census returns.1
- United States -- History -- Civil War, 1861-186510
- United States -- History -- Civil War, 1861-1865 -- Diaries2
- United States Army in World War II1
- United States Military Academy2
- United States Navy - USS WEST VIRGINIA.1
- United States-- History--Civil War, 1861-1865--Veterans2
- United States--Abolition--History2
- United States--Antebellum South--History1