Subjects
- Underground Railroad -- Ohio1
- Underground Railroad -- West Virginia1
- Underwater exploration1
- Union names.2
- Unions - AFGWU.1
- Unions -- Coal1
- Unions.7
- Unions. SEE ALSO Labor organization.1
- Uniontown, PA - Methodists.1
- Uniontown, Pennsylvania - Carriage makers.1
- Unitarian churches1
- United States - Census returns.1
- United States - Social Security.1
- United States -- Army -- Ohio Infantry Regiment, 26th (1861-1865) -- Company B5
- United States -- History -- Civil War 1861-1865 -- Regimental Histories -- New York Infantry -- 21st1