Otto Eisenschiml's background

[Steve]

After some recent posts, I've decided to look more into Eisenschiml's background. According to this page, from the Lincoln library, Otto claimed his father was a member of the 55th Illinois Infantry during the Civil War before later returning to Vienna in the 1870's:

http://alplm-cdi.com/chroniclingillinois/items/show/199

But searching the Civil War Soldiers and Sailor's Database I can't find an Alexander Eisenschiml as a Union soldier. I also couldn't find him in this list of soldiers from the 55th Illinois:

https://archive.org/stream/storyoffiftyf...#page/n923

Does anybody know any information about Alexander Eisenschiml's time in the U.S.? Or if he served in the Army under an assumed name?