Joe --

Born in 1821 makes this man a bit old for military service in the 1860s. Besides, the 1860 census for Kentucky doesn't report anyone by that name born about 1821. Do you know where he went after 1850?

Ancestry is great for almost anything except military records. Instead of one, there are six men named Samuel Wood(s) found on records of Kentucky military commands, two Confederate and four Federal.