Jason,

You really need copies of your uncles service records to see what he did in the war. You can get copies very fast at this web page. The folks here do a fine job.

http://history-sites.com/research/index.html

From the Soldiers and Sailors System

W. W. Millikin (First_Last)
Regiment Name 18 Texas Infantry
Side Confederate
Company A
Soldier's Rank_In Private
Soldier's Rank_Out Private
Alternate Name
Notes
Film Number M227 roll 25

Thanks,
Gary D. Bray