Hi there,
I recollect reading (several decades ago now, so I am not remembering all the details at this minute) about quite a number of NSW citizens who left Australia and headed off to the US of A to serve (some on each side) during the Civil War. I wonder if TROVE will have some info ?
http://trove.nla.gov.au/ndp/del/search?adv=y This should be the link to the digitised newspapers section. Free to search, and you can download pdf or jpeg etc. Sometimes the links fall over, so here's another just in case
http://trove.nla.gov.au/ NSW ER 1878 HARTLEY
All with surname YOUNG
John, residence, Eskbank
Thomas, residence, Eskbank
William, residence, Eskbank
NSW ER 1870 HARTLEY
All with surname YOUNG
Thomas, residence, Marangaroo
James, residence, Mount Victoria
George, residence, Mount Victoria
Cheers, JM