I am a civil War Reenactors from Denmark.
I got into the same problem some years ago.
I did the tuff way by reading everything I could get my hands on, and it aint easy to find the detalis.

I made my own "School of the Union Color-bearer". I have send it to "First Fedral Division", and they was very happy about it and they told me they send it to all there color-bearers.

I be happy to email everyone a copy (it is in english).
Send a email to dyre@blackhats.dk

Hope I can help you boys made history come alive.
Feel free to take a look at our website www.blackhats.dk