Ancestry.com is granting free access to its Civil War Research databases from today (Apr 7) through Thursday, Apr 14. You don't have to be a subscriber to do this research.
Simply go to Ancestry.com and click on the "Search Now" button in the 150th Anniversary Box.
With this acccess, you can view additional Civil War era documents, like Confederate Soldiers Compiled Services Records and Union Soldiers Compiled Services Records that have been digitized by Footnote.com. The process requires that you go to Ancestry.com (Ancestry purchased Footnote a few months ago), search for your ancestor in the Civil War record indexes, then click through and click on the Footnote.com icon to see the actual record images.